What rhymes with unpacker

attacker, backtracker, barebacker, blacker, clacker, claquer, counterattacker, feedbacker, flaker, greenbacker, hacker, horsebacker, jacker, lakher, macer, quacker, racker, sacer, sacker, shacker, stacker, switchbacker, tacker, thwacker, unpacker, whacker, wisecracker, wracker