6 letter words:
rebite8,
5 letter words:
beret7,
biter7,
bruit7,
brute7,
buret7,
rebit7,
rebut7,
tribe7,
tuber7,
retie5,
urite5,
uteri5,
4 letter words:
beer6,
beet6,
bere6,
bete6,
bier6,
bite6,
bree6,
brei6,
brie6,
brit6,
brut6,
bute6,
rube6,
tube6,
etui4,
iure4,
rete4,
rite4,
teer4,
tier4,
tire4,
tree4,
trie4,
true4,
3 letter words:
bee5,
bet5,
bit5,
bru5,
bur5,
but5,
reb5,
rib5,
rub5,
tub5,
urb5,
ere3,
ire3,
ree3,
rei3,
ret3,
rit3,
rue3,
rut3,
tee3,
tie3,
tui3,
ure3,
ute3,
2 letter words:
be4,
bi4,
ee2,
er2,
et2,
it2,
re2,
te2,
ti2,
ur2,
ut2,