5 letter words:
aroba7,
baron7,
borna7,
4 letter words:
arba6,
barn6,
boar6,
bona6,
bora6,
born6,
bran6,
anan4,
anna4,
anno4,
anoa4,
anon4,
arna4,
naan4,
nana4,
nona4,
rana4,
roan4,
3 letter words:
aba5,
abo5,
arb5,
baa5,
ban5,
bar5,
boa5,
bon5,
bor5,
bra5,
bro5,
nab5,
nob5,
oba5,
orb5,
rob5,
ana3,
ann3,
nan3,
non3,
nor3,
oar3,
ora3,
ran3,
2 letter words:
ab4,
ba4,
bo4,
ob4,
aa2,
an2,
ar2,
na2,
no2,
on2,
or2,