9 letter words:
uprunning12,
7 letter words:
pruning10,
punning10,
running8,
6 letter words:
puring9,
urping9,
urning7,
5 letter words:
purin7,
unpin7,
unrip7,
uprun7,
ruing6,
unrig6,
inrun5,
inurn5,
4 letter words:
grip7,
ping7,
prig7,
pung7,
pirn6,
puir6,
puri6,
ginn5,
girn5,
grin5,
gurn5,
guru5,
ring5,
rung5,
ruin4,
3 letter words:
gip6,
gup6,
pig6,
pug6,
nip5,
pin5,
pir5,
piu5,
pun5,
pur5,
rip5,
urp5,
gin4,
gnu4,
gun4,
gur4,
rig4,
rug4,
inn3,
nun3,
nur3,
rin3,
run3,
uni3,
urn3,
2 letter words:
pi4,
up4,
gi3,
gu3,
ug3,
in2,
nu2,
un2,
ur2,
