9 letter words:
froufrous15,
8 letter words:
froufrou14,
7 letter words:
furfurs13,
6 letter words:
furfur12,
furors9,
rufous9,
5 letter words:
ruffs11,
fours8,
furor8,
furrs8,
roofs8,
rurus5,
4 letter words:
offs10,
ruff10,
four7,
fous7,
fros7,
furr7,
furs7,
oofs7,
orfs7,
roof7,
surf7,
ufos7,
ours4,
roos4,
ruru4,
sour4,
urus4,
3 letter words:
off9,
for6,
fou6,
fro6,
fur6,
oof6,
orf6,
ufo6,
oor3,
oos3,
ors3,
our3,
ous3,
roo3,
sou3,
sur3,
2 letter words:
of5,
oo2,
or2,
os2,
ou2,
so2,
ur2,
us2,