6 letter words:
phenix18,
4 letter words:
nixe11,
pein6,
peni6,
pine6,
3 letter words:
hex13,
pix12,
nix10,
hep8,
hip8,
peh8,
phi8,
hen6,
hie6,
hin6,
nep5,
nip5,
pen5,
pie5,
pin5,
nie3,
2 letter words:
ex9,
xi9,
eh5,
he5,
hi5,
pe4,
pi4,
en2,
in2,
ne2,
