5 letter words:
begum10,
brume9,
umber9,
grume8,
4 letter words:
zebu15,
berm8,
berg7,
burg7,
germ7,
geum7,
grub7,
grum7,
mure6,
rube6,
grue5,
urge5,
3 letter words:
bum7,
beg6,
bug6,
gem6,
gum6,
meg6,
mug6,
bur5,
emu5,
reb5,
rem5,
rub5,
rum5,
urb5,
erg4,
reg4,
rug4,
rue3,
2 letter words:
be4,
em4,
me4,
mu4,
um4,
er2,
re2,