Dumbbells rhymes with:
barbells, bluebells, cowbells, alcatel's, barbells, bluebells, bombshells, centel's, citadel's, citrucel's, cockwell's, cowbells, eggshells, falwell's, greenfell's, honeywell's, livingwell's, maxwell's, nextel's, novotels, nutshells, orwell's, pactel's, parallels, rockwell's, rothwells, seashells, snackwell's, snackwells, stairwells, stillwell's
Dumbbells sounds like:
demobilize, demobilizes, demopoulos, dimples, downplays