5 letter words:
bufos10,
fanos8,
fauns8,
snafu8,
aboon7,
bason7,
bonus7,
boons7,
boson7,
bosun7,
bouns7,
bunas7,
4 letter words:
bufo9,
fabs9,
fobs9,
fubs9,
aufs7,
fano7,
fans7,
faun7,
fons7,
fous7,
funs7,
oafs7,
oofs7,
sofa7,
ufos7,
abos6,
bans6,
boas6,
bona6,
boon6,
boos6,
boun6,
buna6,
buns6,
nabs6,
nobs6,
nubs6,
obas6,
obos6,
snab6,
snob6,
snub6,
soba6,
suba6,
anus4,
naos4,
nous4,
onos4,
onus4,
oons4,
soon4,
3 letter words:
fab8,
fob8,
fub8,
auf6,
fan6,
fas6,
fon6,
fou6,
fun6,
oaf6,
oof6,
ufo6,
abo5,
abs5,
ban5,
bas5,
boa5,
bon5,
boo5,
bos5,
bun5,
bus5,
nab5,
nob5,
nub5,
oba5,
obo5,
obs5,
sab5,
sob5,
sub5,
nas3,
noo3,
nos3,
nus3,
ono3,
ons3,
oon3,
oos3,
ous3,
san3,
sau3,
son3,
sou3,
sun3,
uns3,
2 letter words:
fa5,
of5,
ab4,
ba4,
bo4,
ob4,
an2,
as2,
na2,
no2,
nu2,
on2,
oo2,
os2,
ou2,
so2,
un2,
us2,