5 letter words:
caput9,
coapt9,
about7,
4 letter words:
capo8,
coup8,
pact8,
abut6,
atop6,
boat6,
bota6,
bout6,
coat6,
pout6,
tabu6,
taco6,
tuba6,
auto4,
3 letter words:
bap7,
bop7,
cab7,
cap7,
cob7,
cop7,
cub7,
cup7,
pac7,
pub7,
abo5,
act5,
apo5,
apt5,
bat5,
boa5,
bot5,
but5,
cat5,
cot5,
cut5,
oba5,
oca5,
opt5,
pat5,
pot5,
put5,
tab5,
tap5,
top5,
tub5,
tup5,
upo5,
oat3,
out3,
tao3,
tau3,
uta3,
2 letter words:
ab4,
ba4,
bo4,
op4,
pa4,
up4,
at2,
ta2,
to2,
ut2,