7 letter words:
corrupt11,
5 letter words:
croup9,
court7,
crout7,
cruor7,
4 letter words:
coup8,
crop8,
cour6,
curr6,
curt6,
port6,
pour6,
pout6,
purr6,
roup6,
rurp6,
torc6,
trop6,
rort4,
rout4,
torr4,
tour4,
3 letter words:
cop7,
cup7,
cor5,
cot5,
cru5,
cur5,
cut5,
opt5,
orc5,
oup5,
pot5,
pro5,
pur5,
put5,
roc5,
ruc5,
toc5,
top5,
tup5,
upo5,
urp5,
ort3,
our3,
out3,
rot3,
rut3,
tor3,
2 letter words:
op4,
po4,
up4,
or2,
ou2,
to2,
ur2,
ut2,
