“CURBER” is a valid word. — 10 points Scrabble

curea medicine or therapy that cures disease or relieve pain
curban edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)
cubea hexahedron with six equal squares as faces
burrseed vessel having hooks or prickles
rubea person who is not very intelligent or interested in culture
ecrua very light brown
curr
ruer

ruban unforeseen obstacle
cuean actor's line that immediately precedes and serves as a reminder for some action or speech
rueEuropean strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
cuban awkward and inexperienced youth
errto make a mistake or be incorrect
rec
reb`Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their grey Confederate uniforms
curan inferior dog or one of mixed breed
brr
burseed vessel having hooks or prickles
ecu
urb

bea light strong brittle grey toxic bivalent metallic element
era trivalent metallic element of the rare earth group; occurs with yttrium
rea rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum

CURBER