8 letter words:
fusiform16,
6 letter words:
forums11,
rimous8,
5 letter words:
miffs13,
muffs13,
riffs11,
ruffs11,
firms10,
forms10,
forum10,
fours8,
muirs7,
rimus7,
roums7,
4 letter words:
miff12,
muff12,
offs10,
riff10,
ruff10,
firm9,
form9,
from9,
fums9,
firs7,
four7,
fous7,
fris7,
fros7,
furs7,
orfs7,
rifs7,
surf7,
ufos7,
miro6,
mirs6,
miso6,
mors6,
mous6,
muir6,
muso6,
rims6,
rimu6,
roms6,
roum6,
rums6,
smir6,
smur6,
soum6,
sumo6,
ours4,
sori4,
sour4,
3 letter words:
iff9,
off9,
fum8,
fir6,
for6,
fou6,
fro6,
fur6,
ifs6,
orf6,
rif6,
sif6,
ufo6,
ism5,
mir5,
mis5,
moi5,
mor5,
mos5,
mou5,
mus5,
oms5,
rim5,
rom5,
rum5,
sim5,
som5,
sum5,
ios3,
iso3,
ors3,
our3,
ous3,
sir3,
sou3,
sri3,
sui3,
sur3,
2 letter words:
if5,
of5,
mi4,
mo4,
mu4,
om4,
um4,
io2,
is2,
oi2,
or2,
os2,
ou2,
si2,
so2,
ur2,
us2,