8 letter words:
boxberry22,
7 letter words:
robbery14,
6 letter words:
robber10,
5 letter words:
boxer14,
berry10,
borer7,
4 letter words:
boxy16,
oryx14,
byre9,
obey9,
orby9,
oyer7,
yore7,
bore6,
robe6,
3 letter words:
oxy13,
box12,
rex10,
bey8,
boy8,
bye8,
yob8,
bob7,
ebb7,
rye6,
bro5,
brr5,
obe5,
orb5,
reb5,
rob5,
err3,
ore3,
roe3,
2 letter words:
ex9,
ox9,
by7,
oy5,
ye5,
yo5,
be4,
bo4,
er2,
oe2,
or2,
re2,