Zovirax rhymes with:
anthrax, feltrax, prothorax, thorax, votrax, alumax, amax, anthrax, apacs, betamax, 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 sounds like:
zabar's, zaborowski, zabriskie, zebras, zebrowski, zeebrugge, zephyrs, zippers