4 letter words:
ache9,
chao9,
chou9,
each9,
echo9,
oche9,
ouch9,
3 letter words:
ach8,
cha8,
che8,
ech8,
hoc8,
och8,
hae6,
hao6,
hoa6,
hoe6,
hue6,
ace5,
cue5,
eco5,
ecu5,
oca5,
aue3,
eau3,
2 letter words:
ch7,
ah5,
eh5,
ha5,
he5,
ho5,
oh5,
uh5,
ae2,
ea2,
oe2,
ou2,