Over 500 possibilities.
abalone
abasing
abating
abeyant
abiding
abilene
aboding
abscind
abscond
abusing
account
acetone
achtung
actions
adamant
addling
adenine
adjoins
adjoint
adoring
affiant
affront
afghani
afghans
agelong
aground
ailment
airline
aliment
alimony
allying
alumina
amazing
amazons
ambient
ambling
amerind
amnions
amusing
anciens
ancient
anemone
angling
aniline
anodyne
anteing
antenna
Anthony
Antoine
apexing
apolune
appoint
arching
archons
arcking
arcsine
argonne
arguing
arising
ashland
asinine
asquint
assigns
astound
atoning
attains
attaint
augment
autumns
avowant
avowing
awakens
awaking
baboons
babying
backing
badland
bagging
bailing
baiting
balcony
balding
baleens
balkans
balking
balling
banding
banging
banking
banning
banting
banyans
barbing
barging
barking
barrens
barring
bartend
baryons
bashing
basking
basting
bathing
battens
batting
batwing
bawling
bayonne
beacons
beading
beaming
beaning
bearing
beating
beckons
bedding
bedpans
beefing
beeline
beeping
begging
beguine
Beijing
bellini
belting
belying
bemoans
bending
benzene
benzine
besting
bethink
betting
biasing
bibbing
bidding
bilging
bilking
billing
binding
biplane
blaming
blaring
blatant
blazing
blazons
blowing
blueing
boating
bobbing
bobbins
bodkins
bogging
boiling
bolding
bologna
bolting
bombing
bonbons
bonding
bonging
bookend
booking
booming
booting
boozing
bopping
bossing
bowline
bracing
braking
braving
braying
brazing
bretons
brewing
bribing
brigand
britons
brogans
bromine
bucking
budding
budging
buffing
bugging
bugling
bulging
bulking
bulling
bumming
bumping
bunions
bunking
bunting
buoyant
buoying
burbank
burdens
burning
burping
burring
burying
bushing
buskins
bussing
busting
busying
butting
buttons
buzzing
cabling
caching
cadging
caftans
caimans
calcine
calling
calmant
calming
calumny
calving
camping
cancans
canning
cannons
canting
cantons
canyons
capping
carbine
carbons
carding
careens
carmine
carping
carting
cartons
carving
cashing
casting
cations
catkins
catting
causing
caverns
cayenne
caymans
ceasing
ceiling
cervine
chafing
chasing
chemins
chewing
chicane
chicano
chiding
chiming
choking
choline
chorine
citrons
clamant
clawing
clemens
clement
cloning
closing
cloying
clueing
coating
coaxing
cocaine
cocking
cocoons
codeine
codling
coffins
coiling
coining
Collins
cologne
columns
combine
combing
command
commend
comment
commons
commune
company
condone
confine
conking
conning
consent
contend
content
convene
convent
cooking
coolant
cooling
cooping
copping
copying
cording
cordons
corking
corning
costing
cottons
cottony
coupons
courant
cousins
cowhand
cowling
craning
crating
cratons
craving
crayons
crazing
cretins
crewing
crowing
cuffing
cuisine
culling
cunning
cupping
curbing
curling
currant
current
cursing
curving
cushing
cussing
cutting
cycling
cyclone
czarina
dabbing
daemons
damming
damning
dampens
damping
damsons
dancing
darkens
darlene
darling
darning
darting
dashing
datsuns
daubing
dawning
daytona
deacons
deadens
deafens
dealing
decking
decline
deeding
deeming
deepens
defiant
defying
dehorns
deicing
deleing
delrina
delving
demeans
demesne
demount
dentine
denting
denying
deodand
deplane
descant
descend
descent
designs
desmond
despond
destine
destiny
detains
deviant
dialing
diamond
dickens
dieting
digging
diluent
dimming
dinning
dioxane
dipping
disband
dishing
disowns
dissent
distant
distend
distent
dobbins
docking
dodging
doffing
dogbane
dogging
doggone
dolling
dolmens
domains
donning
dooming
dopping
dormant
dotting
dourine
dousing
downing
dowsing
doyenne
dragons
draping
drawing
driving
droning
dubbing
ducking
ducting
dueling
dulling
dumping
dunking
dunning
duodena
dusting
earning
earring
echidna
echoing
eddying
editing
educing
elating
elegant
element
elevens
eliding
eloping
eluding
eminent
emoting
enchant
enduing
England
enjoins
enplane
ensigns
ensuant
ensuing
entrant
entwine
envying
epergne
epicene
erasing
erelong
eroding
errhine
espying
etching
euglena
euphony
evading
evening
evident
evoking
examine
exigent
exiling
exiting
expound
externs
exuding
fagging
sundown..rundown
Steve-n
summons
bunion, canyon, canton, and, wanton.
One country that fits your criteria is Finland. It has seven letters, the third letter is 'n,' and the sixth letter is 'a.'
Some seven letter words with N as the fifth letter areagainstbalancefriendspartnerqueenlyscienceseventy
tincture, puncture, punctual, confound
signals
Nations
neutron
dipsomania
andiron