4 letter words:
plow9,
lown7,
wool7,
loop6,
loup6,
poll6,
polo6,
pool6,
poon6,
pull6,
upon6,
loon4,
lulu4,
nolo4,
null4,
3 letter words:
pow8,
wop8,
low6,
now6,
owl6,
own6,
won6,
woo6,
lop5,
pol5,
poo5,
pul5,
pun5,
upo5,
loo3,
noo3,
ono3,
ulu3,
2 letter words:
ow5,
wo5,
op4,
up4,
lo2,
no2,
nu2,
on2,
un2,