6 letter words:
faring10,
unfair9,
5 letter words:
fagin9,
fungi9,
furan8,
infra8,
garni6,
grain6,
ruing6,
unrig6,
nairu5,
4 letter words:
fang8,
frag8,
frig8,
frug8,
fain7,
fair7,
faun7,
fiar7,
firn7,
naif7,
agin5,
gain5,
gaun5,
gaur5,
girn5,
gnar5,
gran5,
grin5,
guan5,
guar5,
ragi5,
rang5,
ring5,
ruga5,
rung5,
airn4,
rain4,
rani4,
ruin4,
unai4,
3 letter words:
fag7,
fig7,
fug7,
arf6,
fan6,
far6,
fin6,
fir6,
fun6,
fur6,
rif6,
gan4,
gar4,
gin4,
gnu4,
gun4,
nag4,
rag4,
rig4,
rug4,
ain3,
air3,
ani3,
rai3,
ran3,
ria3,
rin3,
run3,
urn3,
2 letter words:
fa5,
if5,
ag3,
ai2,
an2,
ar2,
in2,
na2,
nu2,
un2,