7 letter words:
araroba9,
6 letter words:
arriba8,
arroba8,
barrio8,
5 letter words:
babka13,
kabab13,
kabob13,
abaka11,
kabar11,
korai9,
rabbi9,
arbor7,
briar7,
4 letter words:
bark10,
birk10,
bork10,
kbar10,
abba8,
arak8,
baba8,
barb8,
kora8,
okra8,
raki8,
abri6,
biro6,
birr6,
boar6,
bora6,
brio6,
obia6,
aria4,
orra4,
raia4,
roar4,
3 letter words:
kab9,
kob9,
ark7,
bib7,
bob7,
irk7,
kir7,
koa7,
koi7,
kor7,
oak7,
oka7,
aba5,
abo5,
arb5,
baa5,
bar5,
bio5,
boa5,
bra5,
bro5,
brr5,
oba5,
obi5,
orb5,
rib5,
rob5,
air3,
oar3,
ora3,
rai3,
ria3,
2 letter words:
ka6,
ki6,
ab4,
ba4,
bi4,
bo4,
aa2,
ai2,
ar2,
oi2,
or2,