6 letter words:
nanook10,
5 letter words:
koban11,
fanon8,
aboon7,
4 letter words:
fank11,
bank10,
boak10,
boko10,
bonk10,
book10,
knob10,
kobo10,
nabk10,
kaon8,
koan8,
nook8,
fano7,
bona6,
boon6,
anno4,
anon4,
nona4,
noon4,
3 letter words:
kaf10,
bok9,
kab9,
kob9,
fab8,
fob8,
koa7,
kon7,
oak7,
oka7,
fan6,
fon6,
oaf6,
oof6,
abo5,
ban5,
boa5,
bon5,
boo5,
nab5,
nob5,
oba5,
obo5,
ann3,
nan3,
non3,
noo3,
ono3,
oon3,
2 letter words:
ka6,
ko6,
fa5,
of5,
ab4,
ba4,
bo4,
ob4,
an2,
na2,
no2,
on2,
oo2,