8 letter words:
umpiring13,
7 letter words:
priming12,
6 letter words:
imping11,
impugn11,
umping11,
miring9,
muring9,
riming9,
riping9,
urping9,
5 letter words:
grump10,
primi9,
piing8,
mirin7,
purin7,
unrip7,
iring6,
ruing6,
unrig6,
4 letter words:
gimp9,
impi8,
prim8,
rump8,
grim7,
grip7,
grum7,
ping7,
prig7,
pung7,
mini6,
miri6,
muni6,
pirn6,
puri6,
girn5,
grin5,
ring5,
rung5,
ruin4,
3 letter words:
imp7,
ump7,
gip6,
gum6,
mig6,
mug6,
pig6,
pug6,
mir5,
mun5,
nim5,
nip5,
pin5,
piu5,
pun5,
pur5,
rim5,
rip5,
rum5,
urp5,
gin4,
gnu4,
gun4,
rig4,
rug4,
rin3,
run3,
urn3,
2 letter words:
mi4,
mu4,
pi4,
um4,
up4,
in2,
nu2,
un2,