5 letter words:
kazoo18,
4 letter words:
zonk17,
azan13,
azon13,
zona13,
zoon13,
kapa10,
knap10,
knop10,
kana8,
kaon8,
koan8,
nook8,
napa6,
poon6,
anoa4,
3 letter words:
zap14,
azo12,
zoa12,
zoo12,
kop9,
koa7,
oak7,
oka7,
apo5,
nap5,
pan5,
poo5,
ana3,
noo3,
ono3,
2 letter words:
za11,
ka6,
op4,
pa4,
aa2,
an2,
na2,
no2,
on2,