5 letter words:
fount8,
futon8,
unfit8,
unwit8,
4 letter words:
woof10,
fino7,
foin7,
font7,
foot7,
info7,
nowt7,
tofu7,
town7,
twin7,
wino7,
wont7,
into4,
onto4,
toon4,
unit4,
unto4,
3 letter words:
fin6,
fit6,
fon6,
fou6,
fun6,
now6,
oft6,
own6,
tow6,
two6,
win6,
wit6,
won6,
woo6,
wot6,
ion3,
nit3,
noo3,
not3,
nut3,
ono3,
oot3,
out3,
tin3,
ton3,
too3,
tui3,
tun3,
2 letter words:
if5,
of5,
ow5,
wo5,
in2,
it2,
no2,
nu2,
oi2,
on2,
ti2,
to2,
un2,
ut2,