6 letter words:
bugler9,
bulger9,
bulgur9,
burgle9,
5 letter words:
burke11,
kluge10,
kugel10,
bugle8,
bulge8,
bluer7,
rubel7,
ruble7,
gluer6,
gruel6,
luger6,
4 letter words:
berk10,
bulk10,
kerb10,
kuru8,
leku8,
lurk8,
berg7,
burg7,
grub7,
blue6,
blur6,
burl6,
lube6,
rube6,
glue5,
grue5,
guru5,
luge5,
urge5,
lure4,
rule4,
3 letter words:
keg8,
elk7,
kue7,
lek7,
uke7,
beg6,
bug6,
bel5,
bur5,
reb5,
rub5,
urb5,
erg4,
gel4,
gul4,
leg4,
lug4,
reg4,
rug4,
leu3,
rue3,
ulu3,
2 letter words:
be4,
el2,
er2,
re2,