6 letter words:
karroo10,
barrio8,
5 letter words:
kabob13,
brook11,
baboo9,
iroko9,
karoo9,
korai9,
rabbi9,
arbor7,
briar7,
4 letter words:
bark10,
birk10,
book10,
bork10,
kbar10,
kobo10,
barb8,
boob8,
kora8,
okra8,
raki8,
rook8,
abri6,
biro6,
birr6,
boar6,
boor6,
bora6,
brio6,
broo6,
obia6,
orra4,
roar4,
3 letter words:
kab9,
kob9,
ark7,
bib7,
bob7,
irk7,
kir7,
koa7,
koi7,
kor7,
oak7,
oka7,
abo5,
arb5,
bar5,
bio5,
boa5,
boo5,
bra5,
bro5,
brr5,
oba5,
obi5,
orb5,
rib5,
rob5,
air3,
oar3,
ora3,
rai3,
ria3,
2 letter words:
ka6,
ki6,
ab4,
ba4,
bi4,
bo4,
ai2,
ar2,
oi2,
or2,