13 letter words:
nongonococcal20,
10 letter words:
gonococcal17,
9 letter words:
colcannon13,
7 letter words:
cooncan11,
noncola9,
nonagon8,
ologoan8,
6 letter words:
coccal12,
cognac11,
cacoon10,
cocoon10,
coocoo10,
cannon8,
lagoon7,
longan7,
oolong7,
5 letter words:
cocco11,
cocoa9,
clang8,
cogon8,
colog8,
conga8,
congo8,
ancon7,
canon7,
colon7,
agloo6,
along6,
anglo6,
gonna6,
logan6,
logon6,
longa6,
4 letter words:
coca8,
coco8,
cang7,
clag7,
clog7,
alco6,
calo6,
cann6,
clan6,
clon6,
coal6,
cola6,
conn6,
cool6,
coon6,
loca6,
loco6,
agon5,
gaol5,
goal5,
gool5,
goon5,
lang5,
logo5,
long5,
nong5,
anno4,
anon4,
loan4,
loon4,
nolo4,
nona4,
noon4,
3 letter words:
cag6,
cog6,
can5,
col5,
con5,
coo5,
lac5,
oca5,
ago4,
gal4,
gan4,
goa4,
gon4,
goo4,
lag4,
log4,
nag4,
nog4,
ann3,
loo3,
nan3,
non3,
noo3,
ono3,
oon3,
2 letter words:
ag3,
go3,
al2,
an2,
la2,
lo2,
na2,
no2,
on2,
oo2,