5 letter words:
cubes9,
bouse7,
souce7,
4 letter words:
cobs8,
cube8,
cubs8,
cose6,
cues6,
ecos6,
ecus6,
obes6,
seco6,
3 letter words:
cob7,
cub7,
bes5,
bos5,
bus5,
cos5,
cue5,
eco5,
ecu5,
obe5,
obs5,
sec5,
sob5,
soc5,
sub5,
oes3,
ose3,
ous3,
sou3,
sue3,
use3,
2 letter words:
be4,
bo4,
ob4,
es2,
oe2,
os2,
ou2,
so2,
us2,