9 letter words:
bursiform16,
8 letter words:
ursiform13,
7 letter words:
fibrous12,
6 letter words:
biform13,
fibros11,
forums11,
rosbif11,
morbus10,
rumbos10,
furors9,
burros8,
morris8,
murris8,
rimous8,
rumors8,
sbirro8,
5 letter words:
bumfs12,
bufos10,
fibro10,
firms10,
forbs10,
forms10,
forum10,
fribs10,
borms9,
brims9,
ombus9,
rumbo9,
umbos9,
fours8,
furor8,
furrs8,
biros7,
birrs7,
brios7,
burro7,
burrs7,
muirs7,
murri7,
murrs7,
rimus7,
roums7,
rumor7,
smirr7,
orris5,
4 letter words:
bumf11,
bufo9,
fibs9,
firm9,
fobs9,
forb9,
form9,
frib9,
from9,
fubs9,
fums9,
borm8,
brim8,
bums8,
mibs8,
mobs8,
ombu8,
umbo8,
firs7,
four7,
fous7,
fris7,
fros7,
furr7,
furs7,
orfs7,
rifs7,
surf7,
ufos7,
bios6,
biro6,
birr6,
bois6,
bors6,
brio6,
bris6,
bros6,
brus6,
burr6,
burs6,
miro6,
mirs6,
miso6,
mors6,
mous6,
muir6,
murr6,
muso6,
obis6,
orbs6,
ribs6,
rims6,
rimu6,
robs6,
roms6,
roum6,
rubs6,
rums6,
smir6,
smur6,
sorb6,
soum6,
sumo6,
urbs6,
ours4,
sori4,
sour4,
3 letter words:
fib8,
fob8,
fub8,
fum8,
bum7,
mib7,
mob7,
fir6,
for6,
fou6,
fro6,
fur6,
ifs6,
orf6,
rif6,
sif6,
ufo6,
bio5,
bis5,
boi5,
bor5,
bos5,
bro5,
brr5,
bru5,
bur5,
bus5,
ism5,
mir5,
mis5,
moi5,
mor5,
mos5,
mou5,
mus5,
obi5,
obs5,
oms5,
orb5,
rib5,
rim5,
rob5,
rom5,
rub5,
rum5,
sib5,
sim5,
sob5,
som5,
sub5,
sum5,
urb5,
ios3,
iso3,
ors3,
our3,
ous3,
sir3,
sou3,
sri3,
sui3,
sur3,
2 letter words:
if5,
of5,
bi4,
bo4,
mi4,
mo4,
mu4,
ob4,
om4,
um4,
io2,
is2,
oi2,
or2,
os2,
ou2,
si2,
so2,
ur2,
us2,