6 letter words:
probit10,
roopit8,
5 letter words:
oobit7,
orbit7,
poori7,
poort7,
robot7,
topoi7,
troop7,
4 letter words:
prob8,
biro6,
bito6,
boor6,
boot6,
bort6,
brio6,
brit6,
broo6,
obit6,
poor6,
poot6,
port6,
proo6,
ript6,
roop6,
topi6,
topo6,
trip6,
trop6,
riot4,
root4,
roti4,
roto4,
tiro4,
tori4,
toro4,
trio4,
3 letter words:
bop7,
bio5,
bit5,
boi5,
boo5,
bor5,
bot5,
bro5,
obi5,
obo5,
oop5,
opt5,
orb5,
pir5,
pit5,
poi5,
poo5,
pot5,
pro5,
rib5,
rip5,
rob5,
tip5,
top5,
oor3,
oot3,
ort3,
rit3,
roo3,
rot3,
too3,
tor3,
2 letter words:
bi4,
bo4,
ob4,
op4,
pi4,
po4,
io2,
it2,
oi2,
oo2,
or2,
ti2,
to2,