7 letter words:
forbore12,
6 letter words:
reroof9,
roofer9,
5 letter words:
frore8,
borer7,
4 letter words:
forb9,
fore7,
froe7,
orfe7,
roof7,
boor6,
bore6,
brer6,
broo6,
oboe6,
robe6,
rore4,
3 letter words:
fob8,
erf6,
fer6,
foe6,
for6,
fro6,
oof6,
orf6,
ref6,
boo5,
bor5,
bro5,
brr5,
obe5,
obo5,
orb5,
reb5,
rob5,
err3,
oor3,
ore3,
reo3,
roe3,
roo3,
2 letter words:
ef5,
fe5,
of5,
be4,
bo4,
ob4,
er2,
oe2,
oo2,
or2,
re2,