Powerball rhymes with:
butterball, fireball, arenaball, basketball, blackball, butterball, cannonball, eyeball, fastball, fireball, football, handball, hardball, meatball, mothball, oddball, pinball, racquetball, screwball, snowball, softball, spaceball, spitball, stickball, tidball, trackball, volleyball
Powerball sounds like:
parable, parabola, parboil, powerful, powerfully, prayerful, prebble, preble, prevail, preval, pribble, pribula, pribyl, probable, probably, profile, propel, provable, purple