Anthrax rhymes with:
feltrax, prothorax, thorax, votrax, zovirax, alumax, amax, 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
Anthrax sounds like:
amateurish, amateurs, ammeters, amtrack, amtrak, amtrak's, anadarko, anadarko's, anderegg, anders, andoras, andraki, andras, andrea's, andreas, andrej, andreozzi, andres, andreski, andress, andrew's, andrews, andrews', andrezak, andric, andrich, andrick, andries, andros, andrus, andrzej, andrzejewski, animators, another's, antar's, antares, anteaters, antidrug