6 letter words:
puffer14,
prevue11,
unfree9,
5 letter words:
fever11,
ruffe11,
nerve8,
never8,
revue8,
venue8,
preen7,
prune7,
puree7,
rupee7,
enure5,
4 letter words:
puff12,
ruff10,
perv9,
veep9,
enuf7,
even7,
ever7,
fere7,
fern7,
free7,
neve7,
reef7,
veer7,
neep6,
peen6,
peer6,
pere6,
pree6,
pure6,
erne4,
rune4,
3 letter words:
eff9,
eve6,
fee6,
fen6,
fer6,
feu6,
fun6,
fur6,
ref6,
rev6,
vee6,
pee5,
pen5,
per5,
pun5,
pur5,
rep5,
urp5,
ere3,
ern3,
nee3,
ree3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
pe4,
up4,
en2,
er2,
ne2,
nu2,
re2,
un2,