Betamax rhymes with:
cinemax, paramax, winamac's, alumax, amax, cinemax, paramax, winamac's, alumax, amax, anthrax, apacs, bodziak's, broadnax, brodnax, cinemax, cossacks, delphax, feltrax, horvac's, ivax, kayaks, kazakhs, kovacs, kovaks, mulanax, mullinax, nasdaq's, novak's, paramax, pasternak's, pedophiliacs, prothorax, slovaks, thorax, truax, vegisnax, votrax, winamac's, xanax, zovirax
Betamax sounds like:
baden's, badness, baidoan's, baidoans, baiting, bathing, batons, battening, batting, beating, beatings, beatnik, beatniks, bedding, bedouins, befitting, beheading, beheadings, betting, bettman's, betweens, bidding, biding, biting, bitting, bituminous, boating, boatmen's, bodanis, boeding, boipatong, booting, botanic, botham's, botting, bottom's, bottoming, bottoms, budding, budnick, budnik, buffeting, butting, buttons