Racker rhymes with:
bracher, bracker, cracker, tracker, acker, aker, akre, attacker, backer, bakker, blacker, bracher, bracker, cracker, hacker, lacher, lacquer, macher, makar, packer, sacher, schacher, slacker, stacker, tacker, thacher, thacker, thakkar, tracker, vanacker, wacker, whacker, zacher
Racker sounds like:
racer, racier, rager, raiser, raisor, raker, raser, rasor, raucher, rauscher, rauser, raysor, razor, reacquire, reagor, reaser, reasor, reassure, recarey, recker, recore, recur, reeser, reesor, regehr, reger, regier, reicher, reiger, reischauer, reiser, reker, reoccur, require, rescuer, reser, reusser, richer, ricker, rieger, rieker, rieser, rigor, rigueur, riker, riser, risher, riskier, risser, rizer, rizor, rocher, rocker, roecker, roeser, roger, rogier, rokahr, rokar, rooker, rosaria, rosario, rosary, roscher, roser, roshier, rosier, rosser, rougher, rouser, rouzer, rowser, rozar, rozier, rucker, rueger, ruegsegger, ruger, ruggeri, ruggerio, ruggieri, ruggiero, rukeyser, rusher, ryker, ryser