6 letter words:
ibexes15,
busies8,
5 letter words:
sexes12,
sixes12,
beses7,
bises7,
buses7,
issue5,
seise5,
4 letter words:
ibex13,
exes11,
bees6,
bise6,
buss6,
sibs6,
subs6,
eses4,
sees4,
seis4,
sues4,
uses4,
3 letter words:
sex10,
six10,
xis10,
bee5,
bes5,
bis5,
bus5,
sib5,
sub5,
ess3,
see3,
sei3,
sis3,
sue3,
use3,
2 letter words:
ex9,
xi9,
xu9,
be4,
bi4,
es2,
is2,
si2,
us2,