7 letter words:
pfennig13,
5 letter words:
feign9,
genip8,
penni7,
4 letter words:
fine7,
neif7,
ping7,
pein6,
pine6,
gien5,
nine4,
3 letter words:
fig7,
fen6,
fie6,
fin6,
gip6,
peg6,
pig6,
nip5,
pen5,
pie5,
pin5,
eng4,
gen4,
gie4,
gin4,
neg4,
inn3,
2 letter words:
ef5,
fe5,
if5,
pe4,
pi4,
en2,
in2,
ne2,