6 letter words:
keppen14,
upkeep14,
4 letter words:
keep10,
peek10,
peke10,
puke10,
punk10,
keen8,
knee8,
kune8,
neuk8,
nuke8,
peep8,
neep6,
peen6,
3 letter words:
kep9,
eek7,
eke7,
ken7,
kue7,
pep7,
pup7,
uke7,
pee5,
pen5,
pun5,
nee3,
2 letter words:
pe4,
up4,
en2,
ne2,
nu2,
un2,