6 letter words:
orchid12,
rhodic12,
5 letter words:
chord11,
chiro10,
choir10,
ichor10,
4 letter words:
chid10,
rich9,
cord7,
odic7,
coir6,
3 letter words:
chi8,
hic8,
ich8,
hid7,
hod7,
cod6,
doc6,
rho6,
cor5,
orc5,
roc5,
dor4,
rid4,
rod4,
2 letter words:
hi5,
ho5,
oh5,
do3,
id3,
od3,
oi2,
or2,
