There are around 2015 words in English that end with the suffix 'an'.

abecedarian

abelian

academician

acalephan

acanthocephalan

acanthopterygian

acarian

acaridan

acaridean

acaridian

achkan

acoustician

actinian

adamantean

adman

advanceman

aeolian

aeonian

aeroelastician

aesthetician

afghan

agnathan

agrarian

agribusinessman

aidman

aircraftman

aircraftsman

aircraftswoman

aircraftwoman

airman

airwoman

ajowan

ajwan

alan

alcyonarian

alderman

alderwoman

alloxan

almsman

almswoman

alongshoreman

alphabetarian

altitudinarian

amatorian

amazonian

amban

ambrosian

ambulanceman

ambulancewoman

ameban

amebean

amman

amoebaean

amoeban

amoebean

amphibian

amphiscian

amtman

anan

anchorman

anchorwoman

annelidan

antediluvian

antelucan

antemeridian

anthocyan

anthozoan

anthropophaginian

antiauthoritarian

antichristian

antidisestablishmentarian

antiegalitarian

antihuman

antihumanitarian

antilibertarian

antiman

antinomian

antipodean

antiquarian

antiquitarian

antiscian

antithalian

antitotalitarian

antitrinitarian

antiurban

antiwoman

anuran

anythingarian

apeman

aphelian

aphidian

apian

apiarian

apician

apogean

appendicularian

aquarian

arachnidan

araucarian

arbutean

arcadian

archaean

archdiocesan

archean

archosaurian

arctan

argan

arghan

arithmetician

artesian

arthropodan

artilleryman

artisan

artsman

ascian

ascidian

ashcan

ashman

assemblyman

assemblywoman

asteridian

astrakhan

ataghan

ataman

atman

attackman

attitudinarian

audiometrician

aularian

aurelian

aurorean

authoritarian

automan

avellan

avian

axeman

axman

azan

azurean

baccalaurean

bacchanalian

bacchian

backcourtman

backswordman

backwoodsman

bacterian

badman

bagman

baigan

bailsman

bajan

balbriggan

ballan

ballistician

balmacaan

ban

banausian

bandsman

bandyman

banian

banksman

banyan

baracan

barbarian

barbican

barchan

bargeman

bariatrician

barkan

barkhan

barman

barracan

bartisan

bartizan

basan

baseman

basilican

batman

batrachian

batsman

batswoman

batwoman

bayman

beadman

beadsman

beadswoman

bean

beautician

bedeman

bedesman

bedpan

began

begroan

bellman

beltman

bemean

bemoan

benzofuran

berghaan

besonian

bezonian

bhaigan

bhajan

bildungsroman

bilian

billman

billycan

binman

bioclean

biomathematician

biometrician

biostatistician

bipartisan

birdman

birlieman

bluesman

boardman

boatman

boatsman

bodhran

bogan

bogbean

bogeyman

bogyman

bohemian

bondman

bondsman

bondswoman

bondwoman

boogerman

boogeyman

boogieman

boogyman

bookman

boolean

bothan

bothyman

bowerwoman

bowman

brachyuran

brainpan

brakeman

bran

brannigan

brechan

brideman

bridesman

brinkman

brobdingnagian

brochan

brogan

bryozoan

buckbean

buggan

buran

bushelman

bushelwoman

bushman

bushwoman

businessman

businesswoman

busman

busulfan

buttyman

byreman

byrewoman

cabman

cacotopian

caducean

caecilian

caerulean

caesarean

caesarian

caftan

caiman

calcanean

callan

callipygean

callipygian

callithumpian

calypsonian

caman

cameraman

camerawoman

campestrian

can

cancan

cancellarian

cantharidian

capelan

capitan

capitolian

capstan

captan

caravan

cardigan

carman

carnelian

carrageenan

caryatidean

caseman

castellan

catamaran

catapan

catenarian

cateran

catilinarian

cattleman

cavalryman

caveman

cayman

celibatarian

cellarman

censorian

centaurian

centenarian

centimorgan

cephalopodan

ceratopsian

cerberean

cerberian

cercarian

cerulean

cesarean

cesarian

cestoidean

cetacean

chagan

chainman

chairman

chairwoman

chalan

challan

chalybean

chapman

charlatan

charwoman

chazan

chazzan

chelonian

chessman

chilopodan

chiropteran

chitosan

chlordan

choirman

chondrostian

choreman

christian

chrysophan

chthonian

churchman

churchwoman

circadian

circassian

circensian

circumforanean

civilian

clachan

cladoceran

clan

clansman

clanswoman

classman

claypan

clean

clergyman

clergywoman

clinician

cliometrician

clubman

clubwoman

cnidarian

coachman

coalman

coastguardman

coastguardsman

coccygian

cochairman

cochairwoman

cockleman

cocopan

coleopteran

collegian

collembolan

colorman

colourman

comedian

committeeman

committeewoman

commonwealthsman

communitarian

congressman

congresswoman

conidian

conman

conquian

consistorian

constantan

contemporanean

contrarian

conurban

cooncan

coprophagan

corban

cordilleran

cordovan

cornelian

cornerman

cornopean

cornucopian

corpsman

corpuscularian

cosmetician

cosmopolitan

costean

cotan

cotquean

councilman

councilwoman

counterman

counterplan

counterwoman

countian

countryman

countrywoman

courlan

courtesan

courtezan

cowan

cowman

cracksman

craftsman

craftswoman

cragsman

cran

creolian

crewman

crocodilian

crossbowman

crossopterygian

crucian

crusian

crustacean

cryptogamian

ctenophoran

culinarian

cupman

curran

custodian

cyan

cybernetician

cycloidian

cyclopean

cyclopian

cyprian

cystidean

daedalian

daguerrean

dairyman

dairywoman

dalesman

dalmatian

daman

dan

darshan

daysman

deadman

deadpan

dean

deathsman

decagynian

decandrian

decapodan

decuman

dedalian

deepwaterman

deewan

defenceman

defenseman

deliveryman

deman

demean

demonian

dermapteran

deskman

desman

desmidian

devonian

dewan

dextran

diagnostician

dialectician

diarian

dibenzofuran

didelphian

didynamian

dietarian

dietician

dietitian

digynian

diluvian

dimyarian

dinosaurian

diocesan

dionysian

dioxan

dipnoan

diprionidian

dipteran

disciplinarian

discomedusan

discophoran

disestablishmentarian

dishpan

disman

ditrochean

divan

diwan

doberman

doctrinarian

documentarian

dodecagynian

dodman

doggerman

dolman

doomsman

doorman

doorsman

draconian

draftsman

draftswoman

dragoman

dragsman

draughtman

draughtsman

draughtswoman

drayman

duan

dulcian

durgan

durian

dustman

dustpan

dutchman

dystopian

ealdorman

ean

earthman

earthwoman

eburnean

econometrician

ectozoan

edriophthalmian

egalitarian

egyptian

eightsman

ekistician

elan

electrician

eleutherian

elvan

elysian

empyrean

encyclopedian

endosulfan

enneandrian

entomostracan

entozoan

enzian

eoan

eolian

eonian

ephemeridian

epicedian

epicurean

epigaean

epigean

epinician

epinikian

episcopalian

epistolarian

epitaphian

epizoan

equalitarian

equestrian

establishmentarian

estatesman

esthetician

estuarian

etesian

ethician

ethnohistorian

euclidean

euclidian

eulachan

euphausiacean

eutherian

everyman

everywoman

exciseman

exilian

expressman

exurban

faceman

fan

farmwoman

faustian

favonian

fellowman

fenman

ferromagnesian

ferryman

fieldsman

filarian

filicinean

fingan

finjan

finnan

fireman

firepan

firewoman

firman

fisherman

fisherwoman

flagman

flan

floorman

floridean

flugelman

flyman

foeman

fogman

foilsman

footman

footplateman

footplatewoman

foraminiferan

foreman

foremastman

foremean

foreplan

foreran

foretopman

forewoman

forgeman

fraudsman

freedman

freedwoman

freeman

freewoman

freshman

fretman

frogman

frontiersman

frontierswoman

frontman

fructan

fruitarian

frypan

fugleman

fullan

funnyman

furan

furfuran

fustian

fustilarian

fustilirian

fustillirian

futilitarian

gadsman

gagman

gallican

gallinacean

gambogian

gamelan

gamesman

gan

gangsman

garageman

garbageman

gargantuan

garjan

garran

gasman

gastropodan

gateman

gaussian

gavelman

gean

gemman

gentian

gentilitian

gentleman

gentlewoman

geologian

geometrician

geopolitician

geriatrician

german

geyan

gigantean

gigman

gladiatorian

glasnostian

glassman

glean

gleeman

glottidean

glucan

glycan

glycosaminoglycan

goadsman

goban

gollan

goodman

gorgonian

gorillian

gossan

gowan

gowlan

gownman

gownsman

gozzan

graddan

grammarian

gran

grantsman

grecian

gregarian

gregarinian

gripman

groan

groomsman

groundman

groundsman

guan

guardian

guardsman

gudeman

guildsman

guildswoman

gunman

gypseian

habitan

hackman

hackneyman

hallan

hallian

hammerman

han

handcraftsman

handicraftsman

handicraftswoman

handyman

hangman

hanuman

hardpan

hardwareman

harijan

harman

harmattan

harridan

harvestman

hazan

hazzan

headman

headsman

heliman

heliozoan

helmsman

hemipteran

henchman

henchwoman

herbarian

herculean

herdman

herdsman

hereditarian

hermaean

hessian

heterokontan

heteroousian

heteroscian

heterousian

hetman

hexagynian

hexandrian

hexaplarian

hexosan

hielaman

highman

highwayman

hippocrepian

hippopotamian

hirudinean

historian

hitman

hoastman

hodman

hogan

hoistman

holothurian

hominian

homoiousian

homoousian

homopteran

homousian

honan

hoodman

hoolachan

hoolican

hooligan

horsebean

horseman

horsewoman

hoseman

hotelman

houdan

houseclean

houseman

human

humanitarian

humgruffian

huntsman

husbandman

hwan

hyalomelan

hydromedusan

hydrozoan

hymenaean

hymenean

hymenopteran

hyoidean

hyperborean

hyperdorian

hyperlydian

hyperphrygian

hypoaeolian

hypodorian

hypogaean

hypogean

hypolydian

hypomixolydian

hypophrygian

iceman

ichthyosaurian

icosandrian

idyllian

iguanian

indican

inegalitarian

infantryman

infirmarian

informatician

infrahuman

infralapsarian

infusorian

ingan

inhuman

insectan

inspan

interclan

interocean

interorgan

interurban

intrafallopian

iridian

ironman

isleman

islesman

isokontan

isopodan

isthmian

jackman

jambolan

jampan

janizarian

japan

jarkman

jaspidean

jawan

jazzman

jean

jellybean

jerrican

jerrycan

jordan

journeyman

jubilarian

junkman

juryman

jurywoman

kaftan

kalamdan

kalian

kanban

keelman

khan

kinsman

kinswoman

kirkman

kirpan

kisan

kloochman

klootchman

kneepan

koan

koban

koulan

kulan

kurgan

labyrinthian

lacertian

lacertilian

lactarian

lactean

lactovegetarian

lagan

lallan

laminarian

landamman

landman

landsman

langshan

lapidarian

larrigan

latitudinarian

lauan

laundryman

laundrywoman

lawman

layman

laywoman

leadman

leadsman

lean

leglan

legman

leman

lemurian

lengthsman

lensman

lepidopteran

lernaean

lernean

lesbian

lethean

letterman

leviathan

libertarian

librarian

liegeman

lifespan

liftman

ligan

lighterman

lighthouseman

lilliputian

liman

limitarian

lineman

linesman

lineswoman

linguistician

linkman

linksman

liveryman

loan

lobsterman

lochan

lockman

locksman

locoman

lodesman

logan

logician

logistician

longan

longbowman

longshoreman

loran

lowan

lowerclassman

luckengowan

lumberman

lunarian

lungan

lurdan

lyncean

machan

machineman

macrobian

macruran

madman

madreporian

madrigalian

madwoman

magian

magician

magnesian

magnetician

magsman

maidan

mailman

mailvan

majoritarian

malacopterygian

malacostracan

malapropian

malarian

maltman

malvasian

mammalian

man

manganesian

mangostan

manhattan

mannan

marchman

markman

marksman

markswoman

marmorean

martian

marzipan

mashman

mastigophoran

mathematician

mausolean

mayan

mean

meandrian

meatman

mechanician

mecopteran

median

mediterranean

medusan

megalopolitan

megalosaurian

megatherian

melanian

melphalan

mercaptan

merchantman

meresman

meridian

merman

meropidan

merryman

mesian

mesoamerican

mesozoan

messan

messman

metamathematician

metaphysician

metazoan

metrician

metropolitan

microbian

middleman

midshipman

militiaman

milkman

millenarian

milliradian

minivan

minuteman

minyan

misbegan

miscellanarian

misdemean

misplan

missileman

mixolydian

moan

mobsman

moggan

mohican

molluscan

molluskan

monecian

moneran

moneyman

monocardian

monodelphian

monogenean

monogynian

monomyarian

monoprionidian

moorman

mootman

morgan

morphean

mortician

motorman

moutan

mulligan

murlan

muscleman

musician

mycelian

mycetozoan

myrmidonian

myrobalan

mythologian

naan

nan

neapolitan

necessarian

necessitarian

nectarean

needlewoman

nemertean

nemertian

neogrammarian

neologian

neonomian

neopagan

nepenthean

neuropteran

newsman

newspaperman

newspaperwoman

newswoman

nicotian

nightwatchman

nitrofuran

nobleman

noblewoman

nonagenarian

nonauthoritarian

nonfan

nonhuman

nonlibrarian

nonman

nonmathematician

nonmetropolitan

nonmusician

nonpagan

nonpartisan

nonphysician

nonpolitician

nonsectarian

nontotalitarian

nonurban

nonutilitarian

nonutopian

nonvegetarian

nonveteran

norman

nosean

nothingarian

nudibranchian

nullifidian

nurseryman

nutarian

nymphean

oarsman

oarswoman

obsidian

obstetrician

ocean

octan

octandrian

octogenarian

octonarian

oddsman

odontophoran

oedipean

oilcan

oilman

ombudsman

ombudswoman

oncostman

onomastician

onychophoran

oolachan

oolakan

ophidian

ophiuran

opisthocoelian

oppidan

optician

orangutan

orarian

oratorian

orchardman

ordalian

organ

origan

ornithischian

ornithodelphian

orphan

orthian

orthopteran

ortolan

ostracean

ostracodan

ottoman

oulakan

outdoorsman

outdoorswoman

outman

outplan

outran

outspan

ovarian

overclean

overman

overplan

overran

oversman

ovolactovegetarian

oysterman

packman

paean

paediatrician

paesan

pagan

pagurian

paisan

palmarian

palustrian

pampean

pan

panacean

pancratian

pandemian

pandemonian

panhuman

panomphaean

pantryman

papayan

paphian

papyrian

paradisean

paradisian

paradoxidian

parazoan

parian

parischan

parkinsonian

parliamentarian

parmesan

partan

partisan

partizan

passman

pataphysician

patrician

patrolman

patrolwoman

pattypan

pavan

pavonian

pean

peatman

pecan

pechan

pedestrian

pediatrician

pekan

pelagian

pelican

pelorian

pemican

pemmican

penetralian

penman

pentagynian

pentandrian

pentapolitan

pentosan

penwoman

peptidoglycan

percoidean

perfectibilian

pericardian

peridinian

perigean

peripeteian

peripetian

periscian

permian

peterman

phalansterian

phantasmalian

pharmacopoeian

philologian

phonetician

phraseman

phycocyan

physician

pian

piazzian

picarian

pieman

pigmaean

pigmean

pikeman

pilotman

pitchman

pitchwoman

pitman

pivotman

placeman

plaidman

plainclothesman

plainsman

plan

planarian

plantsman

plantswoman

platan

plateman

platitudinarian

platyrrhinian

pleaseman

plebean

plebeian

plecopteran

plesiosaurian

ploughman

plowman

plumularian

plutonian

pluvian

pogonophoran

pointman

pointsman

policeman

policewoman

politician

pollan

pollman

polygynian

polyhistorian

polyphagian

polyphloesboean

polyzoan

poriferan

pornotopian

portman

portolan

portulan

postdiluvian

postexilian

postlapsarian

postman

postmeridian

postmillenarian

postmillennian

postwoman

potman

poultryman

powan

pozzolan

practician

praetorian

prechristian

precisian

preclean

predestinarian

preexilian

prefreshman

prehistorian

prehuman

prelapsarian

preman

premillenarian

preplan

presbyterian

pressman

presswoman

preterhuman

pretorian

priapean

pridian

privateersman

prizeman

prizewoman

proboscidean

proboscidian

procellarian

procrustean

proglottidean

prolan

proletarian

propman

propraetorian

proseman

prosimian

prosodian

protean

proteoglycan

protistan

protohistorian

protohuman

prototherian

protozoan

psalterian

psychogeriatrician

psychohistorian

psychometrician

ptarmigan

pteropodan

pterosaurian

ptisan

publican

pullman

pultan

punaluan

puntsman

purgatorian

puritan

pygmaean

pygmean

pyran

pyrotechnician

qalamdan

quadragenarian

quadruman

quarryman

quartan

quartodeciman

quean

quillman

quinquagenarian

quintan

quodlibetarian

quotidian

rachidian

raddleman

radian

radiolarian

radioman

raftman

raftsman

raglan

ragman

railman

railwayman

railwoman

rambutan

rampallian

rampsman

ran

ranarian

ranchman

randan

ranzelman

rastafarian

ratan

rataplan

rattan

rean

rebegan

reckan

reclean

redan

reddleman

reedman

reelman

refectorian

regalian

reinsman

reloan

reman

repairman

repairwoman

replan

repoman

reptilian

republican

reran

rewan

rhetorician

rhizocephalan

rhizopodan

rhynchocephalian

rifleman

ringman

riparian

riverman

roadman

roadsman

roan

roberdsman

robertsman

rodman

rodsman

roman

rosarian

rottan

roundsman

routeman

rowan

rubellan

rubrician

ruddleman

ruffian

rumfustian

rupestrian

rurban

ryokan

sabbatarian

sabermetrician

sacramentarian

sacristan

safetyman

saffian

sagaman

sagittarian

salamandrian

salaryman

salesman

saleswoman

salientian

salopian

salpian

salpingian

saltpan

saltpetreman

salutatorian

salvarsan

samaan

saman

samaritan

sampan

san

sandman

sanitarian

sanpan

sapan

sappan

sarafan

saran

sarcodinian

sardonian

sartorian

saturnalian

saucepan

saurian

saurischian

sauropsidan

sauropterygian

scalepan

scan

scarabaean

sceneman

schoolman

scincoidian

scintilliscan

scintiscan

scran

screwbean

scrubwoman

scyphozoan

scytheman

seaman

sean

seawan

seawoman

sectarian

securitan

sedan

seedman

seedsman

selachian

selectman

selectwoman

selenian

semeiotician

seminarian

semiotician

senatorian

septarian

septuagenarian

serran

sertularian

serviceman

servicewoman

sesquipedalian

sewan

sexagenarian

sextan

shadchan

shadkhan

shaitan

shaman

shan

shandrydan

shantyman

shareman

sharesman

sharifian

shearman

shebean

sheepman

sheitan

shenanigan

shereefian

sherifian

shipman

shireman

shopman

shoran

shoreman

shoresman

showman

shwanpan

sialidan

siccan

sickleman

sideman

sidesman

sierran

sightsman

sigillarian

signalman

silurian

silvan

simian

sirenian

skean

skeechan

skidpan

skokiaan

skran

skyman

slaughterman

sloan

slogan

slurban

sneeshan

snowman

sockman

socman

sokeman

solan

soldan

solifidian

solitarian

solitudinarian

soman

sonarman

songman

soroban

soudan

souldan

soundman

sovran

soybean

spaceman

spacewoman

spademan

spadesman

spaeman

span

spartan

spean

spearman

spelaean

spelean

spellican

spermatozoan

spiderman

spinsterian

spleuchan

spoilsman

spokesman

spokeswoman

sporozoan

sporran

sportfisherman

sportsman

sportswoman

squawman

stableman

stagecoachman

stallman

statesman

stateswoman

statistician

stean

stearsman

steelman

steersman

stegocephalian

stegosaurian

stelleridan

stentorian

steradian

stewpan

stickman

stigmarian

stillman

stockman

storeman

strongman

strontian

stroupan

stuntman

stuntwoman

stygian

subclan

subclavian

subdean

subhuman

sublapsarian

sublibrarian

subman

subnivean

subocean

subtacksman

subterranean

subtopian

suburban

suburbicarian

suctorian

suffragan

suidian

suldan

sultan

sumpitan

suntan

superclean

superfan

superhuman

superman

supersalesman

superterranean

superwoman

supralapsarian

surfaceman

surfman

sutorian

swagman

swagsman

swan

swanpan

swingman

switchman

swordman

swordsman

sylvan

sylvestrian

symmetrian

syndyasmian

synodsman

syntan

syrphian

systematician

taboggan

tacan

tacksman

tactician

taguan

tailfan

taipan

talesman

talisman

tallyman

tallywoman

tampan

tan

tapsman

tarlatan

tarletan

tarpan

tartan

tarzan

taurean

tauromachian

taximan

taxman

technician

technopolitan

teleman

teleosaurian

teleostean

teleran

tellurian

telpherman

teopan

terpsichorean

tertian

tetragynian

tetrahydrofuran

tetrandrian

tetrapolitan

tetrapteran

thalassian

thalian

than

theodicean

theologian

theoretician

therian

theropodan

thespian

thirdsman

thysanuran

tidesman

tillerman

timberman

tinman

titan

tithingman

titian

titman

tobaccanalian

toboggan

tolan

tollman

toman

tongman

toolman

topiarian

topman

topsman

toran

totalitarian

toucan

townsman

townswoman

toyman

toywoman

trachearian

trackman

tractarian

tradesman

tradeswoman

tragedian

tragopan

trainman

transandean

transcaucasian

transisthmian

transleithan

transuranian

trapan

trappean

trashcan

trashman

trawlerman

trencherman

trepan

trewsman

triandrian

tribesman

tribeswoman

tribunician

tribunitian

trichopteran

triduan

triffidian

triggerman

trigynian

trimaran

trinacrian

trinitarian

tripeman

triphibian

truchman

truckman

trueman

tryptophan

tuan

tubularian

tulban

tulchan

turban

turbellarian

turbofan

turfman

tutman

tutsan

tutworkman

tympan

typhonian

tyran

ubiquarian

ubiquitarian

uhlan

ulan

ulpan

ultraclean

ultracrepidarian

ultrahuman

unban

unchristian

unclean

underclassman

underman

underran

unfreeman

unhuman

uniformitarian

unitarian

universitarian

unman

unsectarian

unwoman

uplean

upperclassman

upperclasswoman

upran

uranian

urban

urethan

urman

urodelan

utilitarian

utopian

valedictorian

valerian

valetudinarian

van

vanman

varan

vatman

vaudevillean

vaudevillian

vegan

vegetarian

velocipedean

velocipedestrian

velocipedian

venerean

venetian

venireman

verbarian

vermian

verseman

vespertilian

vestryman

vesuvian

veteran

veterinarian

villan

viraginian

viridian

vocabularian

volcanian

vulcan

vulcanian

vulgarian

wakeman

wan

wangan

wanigan

wannigan

warehouseman

warman

warran

washerman

washerwoman

washwoman

wasserman

watchman

waterman

wealsman

wean

weatherman

weighman

whaleman

wheelman

wheelsman

wherryman

wiccan

widowman

wigan

winchman

wingman

wingspan

wireman

wisewoman

witan

woman

woodcraftsman

woodman

woodsman

woolman

workingman

workingwoman

workman

workwoman

xanthan

xiphosuran

xylan

xylophagan

yachtman

yachtsman

yachtswoman

yakhdan

yardman

yarraman

yatagan

yataghan

yean

yeggman

yeoman

yojan

yuan

yulan

zaman

zigan

zoantharian

zoophagan

zupan

zymosan