5 letter words:
bulla7,
buran7,
unbar7,
urban7,
lunar5,
ulnar5,
4 letter words:
ball6,
barn6,
blur6,
bran6,
bull6,
buna6,
bura6,
burl6,
burn6,
luna4,
null4,
nurl4,
ulan4,
ulna4,
3 letter words:
alb5,
arb5,
bal5,
ban5,
bar5,
bra5,
bun5,
bur5,
lab5,
nab5,
nub5,
rub5,
urb5,
all3,
lar3,
ran3,
run3,
urn3,
2 letter words:
ab4,
ba4,
al2,
an2,
ar2,
la2,
na2,
nu2,
un2,