6 letter words:
runrig7,
5 letter words:
knurr9,
ruing6,
unrig6,
4 letter words:
gink9,
gunk9,
king9,
kirn8,
knur8,
kuri8,
rink8,
girn5,
girr5,
grin5,
gurn5,
ring5,
rung5,
nurr4,
ruin4,
3 letter words:
ink7,
irk7,
kin7,
kir7,
gin4,
gnu4,
gun4,
gur4,
rig4,
rug4,
nur3,
rin3,
run3,
uni3,
urn3,
2 letter words:
ki6,
gi3,
gu3,
ug3,
in2,
nu2,
un2,
ur2,