9 letter words:
foolproof17,
5 letter words:
proof10,
floor8,
orlop7,
4 letter words:
flop9,
poof9,
prof9,
flor7,
fool7,
loof7,
rolf7,
roof7,
loop6,
polo6,
pool6,
poor6,
proo6,
roop6,
loor4,
3 letter words:
off9,
fop8,
for6,
fro6,
oof6,
orf6,
lop5,
oop5,
pol5,
poo5,
pro5,
loo3,
lor3,
oor3,
roo3,
2 letter words:
of5,
op4,
po4,
lo2,
oo2,
or2,