7 letter words:
funfair13,
ruffian13,
6 letter words:
runoff12,
unfair9,
ourari6,
5 letter words:
friar8,
furan8,
furor8,
infra8,
nairu5,
noria5,
urari5,
4 letter words:
naff10,
raff10,
riff10,
ruff10,
fain7,
fair7,
fano7,
faro7,
faun7,
fiar7,
fino7,
firn7,
foin7,
fora7,
four7,
info7,
naif7,
airn4,
inro4,
iron4,
naoi4,
noir4,
nori4,
orra4,
rain4,
rani4,
roan4,
roar4,
ruin4,
unai4,
3 letter words:
aff9,
iff9,
off9,
arf6,
fan6,
far6,
fin6,
fir6,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
oaf6,
rif6,
ain3,
air3,
ani3,
ion3,
nor3,
oar3,
ora3,
our3,
rai3,
ran3,
ria3,
rin3,
run3,
urn3,
2 letter words:
fa5,
if5,
of5,
ai2,
an2,
ar2,
in2,
na2,
no2,
nu2,
oi2,
on2,
or2,
un2,