brass knuckles

(US) = knuckleduster (knuckle.

brake pedal, brake-horsepower, brake-shoe, bramble, bran, bran-tub, branch, brand, brand-new, branding-iron, brandish, brandy, brandy-snap, brash, brashly, brashness, Brasilia, brass, brass band, brass hat, brass plate, brass-rubbing, brasserie, brassiere, brassily, brassiness, brassy, brat, brattish, bravado, brave, bravely, bravery, bravo, bravura, brawl, brawler, brawn, brawny, bray,