5 letter words:
tubar7,
augur6,
tugra6,
4 letter words:
brag7,
burg7,
garb7,
grab7,
grub7,
abut6,
baur6,
brat6,
brut6,
buat6,
bura6,
tabu6,
tuba6,
gart5,
gaur5,
grat5,
guar5,
guru5,
ruga5,
trug5,
ratu4,
3 letter words:
bag6,
bug6,
gab6,
gub6,
arb5,
bar5,
bat5,
bra5,
bru5,
bur5,
but5,
rub5,
tab5,
tub5,
urb5,
gar4,
gat4,
gau4,
gur4,
gut4,
rag4,
rug4,
tag4,
tug4,
art3,
rat3,
rut3,
tar3,
tau3,
uta3,
utu3,
2 letter words:
ab4,
ba4,
ag3,
gu3,
ug3,
ar2,
at2,
ta2,
ur2,
ut2,