5 letter words:
furan8,
augur6,
4 letter words:
fang8,
frag8,
frug8,
fugu8,
fung8,
faun7,
faur7,
frau7,
gaun5,
gaur5,
gnar5,
gran5,
guan5,
guar5,
gurn5,
guru5,
rang5,
ruga5,
rung5,
raun4,
unau4,
3 letter words:
fag7,
fug7,
arf6,
auf6,
fan6,
far6,
fra6,
fun6,
fur6,
gan4,
gar4,
gau4,
gnu4,
gun4,
gur4,
nag4,
rag4,
rug4,
ann3,
nan3,
nun3,
nur3,
ran3,
run3,
urn3,
2 letter words:
fa5,
ag3,
gu3,
ug3,
an2,
ar2,
na2,
nu2,
un2,
ur2,