5 letter words:
probe9,
rebop9,
4 letter words:
boep8,
prob8,
boor6,
bore6,
broo6,
oboe6,
poor6,
pore6,
proo6,
repo6,
robe6,
roop6,
rope6,
3 letter words:
bop7,
boo5,
bor5,
bro5,
obe5,
obo5,
oop5,
ope5,
orb5,
per5,
poo5,
pre5,
pro5,
reb5,
rep5,
rob5,
oor3,
ore3,
reo3,
roe3,
roo3,
2 letter words:
be4,
bo4,
ob4,
op4,
pe4,
po4,
er2,
oe2,
oo2,
or2,
re2,