Synonyms to brass knuckles

gantlet, battle cry, bid to combat, cesta, cestus, challenge, confinement, dare, defi, defy, dismemberment, double dare, estrapade, gage, gage of battle, galleys, gauntlet, glove, handwear, hard labor, impalement, imprisonment, incarceration, jailing, keelhauling, kid gloves, kids, martyrdom, mittens, mitts, mousquetaire gloves, mousquetaires, muff, penal servitude, picketing, railriding, rebel yell, rock pile, strappado, tar-and-feathering, the gantlet, torment, torture, war cry, war whoop, ga