9 letter words:
cardboard15,
7 letter words:
carbora11,
6 letter words:
aboard9,
abroad9,
darbar9,
arroba8,
5 letter words:
barca9,
carbo9,
carob9,
cobra9,
board8,
broad8,
dobra8,
arbor7,
ardor6,
radar6,
4 letter words:
carb8,
crab8,
bard7,
brad7,
card7,
coda7,
cord7,
darb7,
drab7,
arco6,
boar6,
bora6,
carr6,
dada6,
dado6,
orca6,
dorr5,
orad5,
road5,
orra4,
roar4,
3 letter words:
cab7,
cob7,
bad6,
bod6,
cad6,
cod6,
dab6,
doc6,
aba5,
abo5,
add5,
arb5,
arc5,
baa5,
bar5,
boa5,
bra5,
bro5,
brr5,
car5,
cor5,
dad5,
oba5,
oca5,
odd5,
orb5,
orc5,
rob5,
roc5,
ado4,
dor4,
oda4,
rad4,
rod4,
oar3,
ora3,
2 letter words:
ab4,
ba4,
bo4,
ad3,
do3,
od3,
aa2,
ar2,
or2,