Castoro rhymes with:
deltoro, kohtoro, santoro, toro, chamorro, corrow, deltoro, demauro, dilauro, dimauro, doro, dorow, dorroh, favaloro, floro, forero, kohtoro, lauro, lavoro, loro, mascorro, mauro, mcmorrow, morro, oro, polidoro, pomodoro, porro, saguaro, santoro, sapporo, sauro, teodoro, tesoro, thoro, toro
Castoro sounds like:
cacciatore, cadre, caster, castor, castro, cater, caterer, cather, catheter, cedar, ceder, cestaro, cetera, chatter, chaudhry, cheater, cheddar, chester, chichester, chitra, chitrao, chitter, chodorow, chowder, chowdhury, cider, citro, coaster, coauthor, coder, coderre, cooter, costar, costeira, coster, costra, coterie, cotter, cottier, couture, couturier, cowdery, cowdrey, cuadra, custer, cuter, cutrer, cutter, cytherea