7 letter words:
hummock20,
5 letter words:
hokum14,
khoum14,
mouch12,
mucho12,
4 letter words:
hock13,
huck13,
mock12,
muck12,
chum11,
much11,
ouch9,
3 letter words:
hmm10,
hum8,
mho8,
ohm8,
cum7,
moc7,
mom7,
mum7,
umm7,
2 letter words:
hm7,
mm6,
ho5,
oh5,
uh5,
mo4,
mu4,
om4,
um4,
