Riker's rhymes with:
rikers, striker's, strikers, strikers', bikers, hikers, pikers, rikers, striker's, strikers, strikers', weicker's
Riker's sounds like:
racehorse, racehorses, racers, rackers, raisers, rakers, raucher's, razor's, razors, reassures, recharge, recourse, recross, regress, requires, rescuers, reseachers, research, research's, researches, resource, resources, resources', richcreek, rickers, riechers, rigorous, rigors, rikers, rockers, rockrose, roger's, rogers, rogers', rogers's, rosaria's, rosaries