9 letter words:
connexion18,
6 letter words:
exonic15,
conine8,
neocon8,
ionone6,
5 letter words:
xenic14,
xenon12,
conin7,
nonce7,
ninon5,
onion5,
4 letter words:
exon11,
nixe11,
oxen11,
cine6,
cion6,
coin6,
cone6,
coni6,
conn6,
coon6,
icon6,
nice6,
once6,
neon4,
nine4,
none4,
noon4,
3 letter words:
cox12,
nix10,
oxo10,
con5,
coo5,
ice5,
eon3,
inn3,
ion3,
noo3,
one3,
ono3,
2 letter words:
ex9,
ox9,
xi9,
en2,
in2,
ne2,
no2,
oe2,
oi2,
on2,