6 letter words:
zipper19,
yipper13,
5 letter words:
zippy21,
prize16,
wiper10,
piper9,
4 letter words:
pize15,
prez15,
pipy11,
wiry10,
prey9,
pyre9,
rype9,
wipe9,
yipe9,
perp8,
pipe8,
prep8,
repp8,
ripp8,
weir7,
wire7,
peri6,
pier6,
ripe6,
3 letter words:
wiz15,
zep14,
zip14,
rez12,
riz12,
wey9,
wry9,
wye9,
yew9,
pew8,
pry8,
pye8,
yep8,
yip8,
pep7,
pip7,
rew6,
rye6,
per5,
pie5,
pir5,
pre5,
rep5,
rip5,
ire3,
rei3,
2 letter words:
we5,
ye5,
pe4,
pi4,
er2,
re2,