9 letter words:
perturber13,
prereturn11,
8 letter words:
brunette10,
putterer10,
rebutter10,
repenter10,
returnee8,
returner8,
7 letter words:
perturb11,
burette9,
preener9,
preteen9,
terpene9,
enterer7,
reenter7,
reutter7,
terreen7,
terrene7,
utterer7,
6 letter words:
beeper10,
better8,
brunet8,
bunter8,
burner8,
burnet8,
burrer8,
butene8,
butter8,
perter8,
petter8,
pruner8,
punter8,
puttee8,
putter8,
repent8,
repute8,
entree6,
eterne6,
netter6,
neuter6,
nutter6,
renter6,
rerent6,
retene6,
retune6,
return6,
teener6,
teeter6,
tenter6,
tenure6,
terete6,
terret6,
tureen6,
turner6,
turret6,
ureter6,
5 letter words:
beret7,
brent7,
brunt7,
brute7,
buret7,
burnt7,
butte7,
erupt7,
peter7,
preen7,
prune7,
puree7,
purer7,
rebut7,
rupee7,
tepee7,
tuber7,
enter5,
enure5,
rente5,
rerun5,
tenet5,
terne5,
treen5,
truer5,
tuner5,
tutee5,
utter5,
4 letter words:
beep8,
burp8,
been6,
beer6,
beet6,
bene6,
bent6,
bree6,
bren6,
brrr6,
brut6,
bunt6,
burn6,
burr6,
bute6,
butt6,
epee6,
neep6,
peen6,
peer6,
pent6,
pere6,
pert6,
pree6,
punt6,
pure6,
purr6,
putt6,
rube6,
tube6,
unbe6,
erne4,
nett4,
rent4,
rete4,
ruer4,
rune4,
runt4,
teen4,
tent4,
tern4,
tree4,
tret4,
true4,
tune4,
turn4,
3 letter words:
pub7,
bee5,
ben5,
bet5,
brr5,
bun5,
bur5,
but5,
neb5,
nub5,
pee5,
pen5,
per5,
pet5,
pun5,
pur5,
put5,
reb5,
rep5,
rub5,
tub5,
tup5,
urb5,
urp5,
ere3,
ern3,
err3,
nee3,
net3,
nut3,
ree3,
ret3,
rue3,
run3,
rut3,
tee3,
ten3,
tet3,
tun3,
tut3,
urn3,
ute3,
2 letter words:
be4,
pe4,
up4,
en2,
er2,
et2,
ne2,
nu2,
re2,
un2,
ut2,