9 letter words:
anthozoan21,
5 letter words:
azoth17,
hazan17,
honan8,
4 letter words:
azan13,
azon13,
zona13,
zoon13,
hant7,
hoot7,
oath7,
than7,
anna4,
anoa4,
anon4,
anta4,
naan4,
nana4,
nona4,
noon4,
nota4,
onto4,
toon4,
3 letter words:
azo12,
zoa12,
zoo12,
aah6,
aha6,
hao6,
hat6,
hon6,
hot6,
nah6,
noh6,
nth6,
oho6,
ooh6,
tho6,
ana3,
ant3,
nan3,
noo3,
not3,
oat3,
ono3,
oot3,
tan3,
tao3,
ton3,
too3,
2 letter words:
za11,
ah5,
ha5,
ho5,
oh5,
aa2,
an2,
at2,
na2,
no2,
on2,
ta2,
to2,
