5 letter words:
orach10,
roach10,
4 letter words:
czar15,
arch9,
chao9,
char9,
haar7,
hoar7,
hora7,
arco6,
orca6,
3 letter words:
coz14,
azo12,
zoa12,
aah6,
aha6,
hao6,
rah6,
rho6,
arc5,
car5,
cor5,
oca5,
orc5,
roc5,
oar3,
ora3,
2 letter words:
za11,
ah5,
ha5,
ho5,
oh5,
aa2,
ar2,
or2,