6 letter words:
bunion8,
5 letter words:
onion5,
union5,
4 letter words:
bozo15,
ouzo13,
zoon13,
boon6,
bunn6,
noon4,
noun4,
3 letter words:
biz14,
zin12,
zoo12,
bin5,
bio5,
boo5,
bun5,
nib5,
nob5,
nub5,
obi5,
inn3,
ion3,
noo3,
nun3,
ono3,
2 letter words:
bi4,
bo4,
in2,
no2,
nu2,
oi2,
on2,
un2,