5 letter words:
opium9,
primo9,
4 letter words:
bump10,
brim8,
burp8,
prim8,
prom8,
romp8,
rump8,
umbo8,
biro6,
brio6,
pour6,
puri6,
roup6,
3 letter words:
bop7,
bum7,
imp7,
mib7,
mob7,
mop7,
pom7,
pub7,
ump7,
bio5,
bro5,
bur5,
mir5,
mor5,
obi5,
orb5,
piu5,
poi5,
pro5,
pur5,
rib5,
rim5,
rip5,
rob5,
rom5,
rub5,
rum5,
upo5,
urb5,
urp5,
our3,
2 letter words:
bi4,
bo4,
mi4,
mo4,
mu4,
om4,
op4,
pi4,
um4,
up4,
oi2,
or2,