Phelps rhymes with:
felps, felps, helps, kelps, alps, felps, gulps, helps, kelps, scalps
Phelps sounds like:
palafox, pavlovic, pavlovich, pelvic, pelvis, phelps's, philbeck, philip's, philippic, philippoussis, philipps, philips, philips', philips's, phillip's, phillipps, phillips, phillips', phillips's, pilevsky, plavsic, plavsic's, playback, playbook, playboy's, playoffs, polivka, polyphase, polyps, pullback, pullbacks