According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 227 words with the pattern ---B-. That is, five letter words with 4th letter B. In alphabetical order, they are:
adobe
adobo
alibi
ameba
araba
aroba
bambi
barbe
barbs
barby
bibbs
bilbo
bilby
bimbo
blabs
blebs
blobs
blubs
boabs
bobby
bombe
bombo
bombs
boobs
booby
bribe
bubba
bubby
bulbs
bumbo
burbs
busby
cabby
carbo
carbs
carby
ceiba
chibs
chubs
clubs
cobbs
cobby
colby
combe
combi
combo
combs
comby
corbe
corby
crabs
cribs
cubby
curbs
dabba
darbs
daube
daubs
dauby
debby
derby
dhobi
dibbs
diebs
doabs
dobby
doobs
dorba
dorbs
doubt
drabs
dribs
drubs
dsobo
dubbo
dumbo
dumbs
feebs
flabs
flubs
flyby
forbs
forby
frabs
fribs
fubby
gabby
gamba
gambe
gambo
gambs
garbe
garbo
garbs
gerbe
gleba
glebe
gleby
glibs
globe
globi
globs
globy
gobbi
gobbo
gobby
gombo
gooby
grabs
grebe
grubs
gumbo
hamba
herbs
herby
himbo
hobby
howbe
hubby
iambi
iambs
jambe
jambo
jambs
jambu
jembe
jibbs
jumbo
jumby
kembo
kembs
kerbs
kibbe
kibbi
kimbo
kirby
knobs
knubs
kombu
konbu
krabs
krubi
lambs
lamby
lesbo
limba
limbi
limbo
limbs
limby
lobby
looby
mamba
mambo
mauby
maybe
mobby
nimbi
nimbs
nobby
nubby
numbs
oribi
outby
plebe
plebs
pombe
probe
probs
rabbi
rebbe
ribby
rubby
rumba
rumbo
samba
sambo
sauba
scabs
sibbs
simba
slabs
slobs
slubb
slubs
snabs
snebs
snibs
snobs
snubs
sorbo
sorbs
stabs
stobs
stubs
subby
swabs
swobs
sybbe
tabby
taube
thebe
timbo
tombs
trabs
tribe
tsuba
tubby
turbo
urubu
verbs
warbs
warby
webby
wembs
wombs
womby
yabba
yabby
yerba
yobbo
zambo
zimbi
zimbs
zombi
Some five letter words with A as the fourth letter:cheapcheatcoralfloatmoralpetalscramscrapsolarsonarsplatviral
Some five letter words with the fourth letter U are:aboutalbumaloudannulbayoubegunboguscloudcroupennuiensuefetusficusflourfocusforumfraudfuguegamutghoulgroupgrouthumusimbueincurinputkaputlemurlotusnexusopiumpiouspiqueproudqueuerebusrebutrerunrevuerogueseguescourscoutscrubserumshoutshrubshrugsnoutspoutstoutstrumsyruptroutuncutunduevaluevenuevirusvogue
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A--AI. That is, five letter words with 1st letter A and 4th letter A and 5th letter I. In alphabetical order, they are: assai
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --AAI. That is, five letter words with 3rd letter A and 4th letter A and 5th letter I. In alphabetical order, they are: braai
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A--II. That is, five letter words with 1st letter A and 4th letter I and 5th letter I. In alphabetical order, they are: aalii
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -IAA-. That is, five letter words with 2nd letter I and 3rd letter A and 4th letter A. In alphabetical order, they are: kiaat
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern ---FI. That is, five letter words with 4th letter F and 5th letter I. In alphabetical order, they are: buffi kulfi
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -F-I-. That is, five letter words with 2nd letter F and 4th letter I. In alphabetical order, they are: affix afrit
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -I-AI. That is, five letter words with 2nd letter I and 4th letter A and 5th letter I. In alphabetical order, they are: litai pirai
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -A-II. That is, five letter words with 2nd letter A and 4th letter I and 5th letter I. In alphabetical order, they are: aalii radii
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A-IF-. That is, five letter words with 1st letter A and 3rd letter I and 4th letter F. In alphabetical order, they are: alifs
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-AM-. That is, five letter words with 1st letter I and 3rd letter A and 4th letter M. In alphabetical order, they are: imams