“ZAREBA” is a valid word. — 17 points Scrabble

areaa particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
bearmassive plantigrade carnivorous or omnivorous mammals with long shaggy coats and strong claws
barelay bare
razetear down so as to make flat with the ground
braea slope or hillside

area unit of surface area equal to 100 square meters
bara room or establishment where alcoholic drinks are served over a counter
earthe sense organ for hearing and equilibrium
eraa period marked by distinctive character or reckoned from a fixed point or event
braan undergarment worn by women to support their breasts
baathe cry made by sheep
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
abaa loose sleeveless outer garment made from aba cloth; worn by Arabs
arbsomeone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential)

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
baa soft silvery metallic element of the alkali earth group; found in barite
ara colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
ae
aaa dry form of lava resembling clinkers
aba bachelor's degree in arts and sciences
za

ZAREBA