9 letter words:
guanabana12,
6 letter words:
banana8,
nagana7,
5 letter words:
unban7,
4 letter words:
bang7,
bung7,
buna6,
bunn6,
anga5,
gaun5,
guan5,
anna4,
naan4,
nana4,
3 letter words:
bag6,
bug6,
gab6,
aba5,
baa5,
ban5,
bun5,
nab5,
nub5,
aga4,
gan4,
gnu4,
gun4,
nag4,
ana3,
nan3,
nun3,
2 letter words:
ab4,
ba4,
ag3,
aa2,
an2,
na2,
nu2,
un2,
