6 letter words:
unbusy11,
5 letter words:
usury8,
burns7,
rubus7,
4 letter words:
bury9,
busy9,
buys9,
ruby9,
buns6,
burn6,
burs6,
nubs6,
rubs6,
snub6,
urbs6,
runs4,
urns4,
urus4,
3 letter words:
buy8,
bys8,
syn6,
bun5,
bur5,
bus5,
nub5,
rub5,
sub5,
urb5,
nus3,
run3,
sun3,
uns3,
urn3,
2 letter words:
by7,
nu2,
un2,
us2,