5 letter words:
upper9,
getup8,
purge8,
erupt7,
upter7,
4 letter words:
perp8,
prep8,
repp8,
pert6,
puer6,
pure6,
gert5,
grue5,
tegu5,
trug5,
urge5,
true4,
3 letter words:
pep7,
pup7,
gup6,
peg6,
pug6,
per5,
pet5,
pre5,
pur5,
put5,
rep5,
tup5,
urp5,
erg4,
get4,
gue4,
gur4,
gut4,
reg4,
rug4,
teg4,
tug4,
ret3,
rue3,
rut3,
ure3,
ute3,
2 letter words:
pe4,
up4,
gu3,
ug3,
er2,
et2,
re2,
te2,
ur2,
ut2,