5 letter words:
exurb14,
4 letter words:
brux13,
ibex13,
beer6,
bere6,
bier6,
bree6,
brei6,
brie6,
rube6,
iure4,
3 letter words:
rex10,
bee5,
bru5,
bur5,
reb5,
rib5,
rub5,
urb5,
ere3,
ire3,
ree3,
rei3,
rue3,
ure3,
2 letter words:
ex9,
xi9,
xu9,
be4,
bi4,
ee2,
er2,
re2,
ur2,