7 letter words:
preempt13,
permute11,
gumtree10,
6 letter words:
pumper12,
repump12,
temper10,
pugree9,
tergum9,
repute8,
5 letter words:
grump10,
trump9,
upper9,
getup8,
grume8,
merge8,
purge8,
repeg8,
erupt7,
meter7,
metre7,
muter7,
peter7,
puree7,
remet7,
retem7,
rupee7,
egret6,
greet6,
4 letter words:
pump10,
peep8,
perm8,
perp8,
prep8,
repp8,
rump8,
temp8,
tump8,
germ7,
geum7,
grum7,
emeu6,
meet6,
mere6,
mete6,
mure6,
mute6,
peer6,
pere6,
pert6,
pree6,
pure6,
teem6,
term6,
eger5,
gree5,
grue5,
trug5,
urge5,
rete4,
tree4,
true4,
3 letter words:
pep7,
pup7,
ump7,
gem6,
gum6,
meg6,
mug6,
peg6,
pug6,
eme5,
emu5,
met5,
mut5,
pee5,
per5,
pet5,
pur5,
put5,
rem5,
rep5,
rum5,
tup5,
urp5,
erg4,
gee4,
get4,
gut4,
reg4,
rug4,
teg4,
tug4,
ere3,
ree3,
ret3,
rue3,
rut3,
tee3,
ute3,
2 letter words:
em4,
me4,
mu4,
pe4,
um4,
up4,
er2,
et2,
re2,
ut2,