5 letter words:
opine7,
paeon7,
piano7,
4 letter words:
pfui9,
pouf9,
enuf7,
fain7,
fane7,
fano7,
faun7,
fine7,
fino7,
foin7,
info7,
naif7,
neif7,
nape6,
neap6,
nipa6,
nope6,
open6,
pain6,
pane6,
pean6,
pein6,
peon6,
pian6,
pina6,
pine6,
pion6,
pone6,
puna6,
upon6,
aeon4,
naoi4,
unai4,
3 letter words:
fop8,
fan6,
fen6,
feu6,
fie6,
fin6,
foe6,
fon6,
fou6,
fun6,
oaf6,
ape5,
apo5,
nap5,
nip5,
ope5,
pan5,
pea5,
pen5,
pia5,
pie5,
pin5,
piu5,
poi5,
pun5,
upo5,
ain3,
ane3,
ani3,
eau3,
eon3,
ion3,
nae3,
one3,
2 letter words:
ef5,
fa5,
fe5,
if5,
of5,
op4,
pa4,
pe4,
pi4,
up4,
ae2,
ai2,
an2,
en2,
in2,
na2,
ne2,
no2,
nu2,
oe2,
oi2,
on2,
un2,