9 letter words:
furfurans15,
8 letter words:
furfuran14,
7 letter words:
furfurs13,
6 letter words:
furfur12,
furans9,
5 letter words:
naffs11,
nuffs11,
raffs11,
ruffs11,
snuff11,
fauns8,
fraus8,
furan8,
furrs8,
snafu8,
snarf8,
nurrs5,
rauns5,
rurus5,
surra5,
unaus5,
4 letter words:
naff10,
nuff10,
raff10,
ruff10,
arfs7,
aufs7,
fans7,
fars7,
faun7,
faur7,
fras7,
frau7,
funs7,
furr7,
furs7,
surf7,
anus4,
nurr4,
nurs4,
raun4,
runs4,
ruru4,
rusa4,
snar4,
sura4,
unau4,
urns4,
ursa4,
urus4,
3 letter words:
aff9,
arf6,
auf6,
fan6,
far6,
fas6,
fra6,
fun6,
fur6,
ars3,
nas3,
nur3,
nus3,
ran3,
ras3,
run3,
san3,
sar3,
sau3,
sun3,
sur3,
uns3,
urn3,
2 letter words:
fa5,
an2,
ar2,
as2,
na2,
nu2,
un2,
ur2,
us2,
