5 letter words:
penie7,
4 letter words:
fief10,
fife10,
niff10,
feen7,
feni7,
fine7,
neif7,
nief7,
nife7,
neep6,
peen6,
pein6,
pene6,
peni6,
pine6,
eine4,
3 letter words:
eff9,
iff9,
fee6,
fen6,
fie6,
fin6,
nef6,
nep5,
nip5,
pee5,
pen5,
pie5,
pin5,
een3,
ene3,
nee3,
nie3,
2 letter words:
ef5,
fe5,
if5,
pe4,
pi4,
ee2,
en2,
in2,
ne2,