Pushups rhymes with:
push-ups, push-ups, push-ups, backups, buildups, buttercups, checkups, cleanups, coverups, eggcups, grownups, hangups, holdups, hookups, lineups, linkups, markups, pickups, push-ups, runups, setups, shakeups, startups
Pushups sounds like:
pacific, pacific's, pacifica, pacifico, pago_pago, passbook, passbooks, paysops, pickups, piggyback, poughkeepsie, poughkeepsie's, push-ups