7 letter words:
fibrous12,
furioso10,
6 letter words:
fibros11,
proofs11,
rosbif11,
buroos8,
oribis8,
pooris8,
porous8,
5 letter words:
bufos10,
fibro10,
forbs10,
fribs10,
poofs10,
poufs10,
profs10,
proof10,
spoof10,
burps9,
probs9,
pubis9,
fours8,
roofs8,
biros7,
boors7,
brios7,
broos7,
buroo7,
oribi7,
pious7,
poori7,
pours7,
proso7,
puris7,
roops7,
roups7,
sirup7,
sopor7,
sorbo7,
spoor7,
4 letter words:
bufo9,
fibs9,
fobs9,
fops9,
forb9,
frib9,
fubs9,
pfui9,
poof9,
pouf9,
prof9,
spif9,
bops8,
burp8,
prob8,
pubs8,
firs7,
four7,
fous7,
fris7,
fros7,
furs7,
oofs7,
orfs7,
rifs7,
roof7,
surf7,
ufos7,
bios6,
biro6,
bois6,
boor6,
boos6,
bors6,
brio6,
bris6,
broo6,
bros6,
brus6,
burs6,
ibis6,
obis6,
obos6,
oops6,
opus6,
orbs6,
oups6,
pirs6,
piso6,
pois6,
poor6,
poos6,
pour6,
proo6,
pros6,
puir6,
puri6,
purs6,
ribs6,
rips6,
risp6,
robs6,
roop6,
roup6,
rubs6,
soop6,
sorb6,
soup6,
spur6,
urbs6,
urps6,
iris4,
ours4,
roos4,
siri4,
sori4,
sour4,
3 letter words:
fib8,
fob8,
fop8,
fub8,
bop7,
pub7,
fir6,
for6,
fou6,
fro6,
fur6,
ifs6,
oof6,
orf6,
rif6,
sif6,
ufo6,
bio5,
bis5,
boi5,
boo5,
bor5,
bos5,
bro5,
bru5,
bur5,
bus5,
obi5,
obo5,
obs5,
oop5,
ops5,
orb5,
oup5,
pir5,
pis5,
piu5,
poi5,
poo5,
pos5,
pro5,
psi5,
pur5,
pus5,
rib5,
rip5,
rob5,
rub5,
sib5,
sip5,
sob5,
sop5,
sub5,
sup5,
upo5,
ups5,
urb5,
urp5,
ios3,
iso3,
oor3,
oos3,
ors3,
our3,
ous3,
roo3,
sir3,
sou3,
sri3,
sui3,
sur3,
2 letter words:
if5,
of5,
bi4,
bo4,
ob4,
op4,
pi4,
po4,
up4,
io2,
is2,
oi2,
oo2,
or2,
os2,
ou2,
si2,
so2,
ur2,
us2,