6 letter words:
upfill11,
unfool9,
5 letter words:
fillo8,
folio8,
lupin7,
poilu7,
polio7,
pulli7,
4 letter words:
flip9,
flop9,
pfui9,
poof9,
pouf9,
fill7,
filo7,
fino7,
foil7,
foin7,
fool7,
foul7,
full7,
info7,
loof7,
lipo6,
loop6,
loup6,
noop6,
noup6,
pill6,
pion6,
poll6,
polo6,
pool6,
poon6,
puli6,
pull6,
upon6,
lilo4,
lino4,
lion4,
loin4,
loon4,
loun4,
nill4,
noil4,
noll4,
nolo4,
noul4,
null4,
olio4,
3 letter words:
fop8,
fil6,
fin6,
flu6,
fon6,
fou6,
fun6,
oof6,
ufo6,
lip5,
lop5,
nip5,
oop5,
oup5,
pin5,
piu5,
plu5,
poi5,
pol5,
poo5,
pul5,
pun5,
upo5,
ill3,
ion3,
lin3,
loo3,
lou3,
nil3,
noo3,
oil3,
ono3,
oon3,
uni3,
2 letter words:
if5,
of5,
op4,
pi4,
po4,
up4,
in2,
io2,
li2,
lo2,
no2,
nu2,
oi2,
on2,
oo2,
ou2,
un2,