4 letter words:
blot6,
bolo6,
bolt6,
bool6,
boon6,
boot6,
lobo6,
obol6,
loon4,
loot4,
loto4,
nolo4,
onto4,
oont4,
tool4,
toon4,
3 letter words:
bon5,
boo5,
bot5,
lob5,
nob5,
obo5,
loo3,
lot3,
noo3,
not3,
ono3,
oon3,
oot3,
ton3,
too3,
2 letter words:
bo4,
ob4,
lo2,
no2,
on2,
oo2,
to2,