5 letter words:
fount8,
futon8,
4 letter words:
nuff10,
toff10,
tuff10,
font7,
foot7,
tofu7,
nout4,
onto4,
oont4,
toon4,
toun4,
unto4,
3 letter words:
off9,
fon6,
fou6,
fun6,
oft6,
oof6,
ufo6,
noo3,
not3,
nut3,
ono3,
oon3,
oot3,
out3,
ton3,
too3,
tun3,
2 letter words:
of5,
no2,
nu2,
on2,
oo2,
ou2,
to2,
un2,
ut2,