4 letter words:
expo13,
exon11,
oxen11,
neep6,
nope6,
open6,
peen6,
pene6,
peon6,
pone6,
3 letter words:
pox12,
exo10,
nox10,
nep5,
ope5,
pee5,
pen5,
een3,
ene3,
eon3,
nee3,
one3,
2 letter words:
ex9,
ox9,
op4,
pe4,
po4,
ee2,
en2,
ne2,
no2,
oe2,
on2,