5 letter words:
proof10,
furor8,
4 letter words:
poof9,
pouf9,
prof9,
four7,
furr7,
roof7,
poor6,
pour6,
proo6,
purr6,
roop6,
roup6,
rurp6,
3 letter words:
fop8,
for6,
fou6,
fro6,
fur6,
oof6,
orf6,
ufo6,
oop5,
oup5,
poo5,
pro5,
pur5,
upo5,
urp5,
oor3,
our3,
roo3,
2 letter words:
of5,
op4,
po4,
up4,
oo2,
or2,
ou2,
ur2,