4 letter words:
crag7,
carn6,
curn6,
narc6,
gaun5,
gaur5,
gnar5,
gran5,
guan5,
guar5,
rang5,
ruga5,
rung5,
3 letter words:
arc5,
can5,
car5,
cru5,
cur5,
gan4,
gar4,
gnu4,
gun4,
nag4,
rag4,
rug4,
ran3,
run3,
urn3,
2 letter words:
ag3,
an2,
ar2,
na2,
nu2,
un2,