6 letter words:
coitus8,
5 letter words:
cutis7,
ictus7,
scout7,
stoic7,
4 letter words:
cist6,
cost6,
cots6,
cuts6,
otic6,
scot6,
scut6,
tics6,
oust4,
outs4,
suit4,
tuis4,
3 letter words:
cis5,
cos5,
cot5,
cut5,
sic5,
tic5,
its3,
out3,
sit3,
sot3,
sou3,
tis3,
tui3,
uts3,
2 letter words:
is2,
it2,
oi2,
os2,
si2,
so2,
ti2,
to2,
us2,
ut2,