7 letter words:
copping14,
6 letter words:
coping11,
5 letter words:
coign8,
gipon8,
incog8,
oping8,
pingo8,
4 letter words:
ping7,
pong7,
cion6,
coin6,
coni6,
icon6,
pion6,
3 letter words:
cop7,
pic7,
pip7,
pop7,
cig6,
cog6,
gip6,
pig6,
con5,
nip5,
pin5,
poi5,
gin4,
nog4,
ion3,
2 letter words:
op4,
pi4,
go3,
in2,
no2,
oi2,
on2,