Triad's rhymes with:
triads, triads, triads, autorads, comrades, doodads, keypad's, keypads, nomad's, nomads, tetrads, triads
Triad's sounds like:
tarots, tarts, tertius, tetrads, third's, thirds, thirties, thirty's, thordis, thortec, threads, threats, throats, thwarts, tirades, tortoise, tortoises, torts, tortuous, tourette's, touretzky, towards, trade's, trades, traits, treads, treaties, treatise, treatises, treats, treaty's, triads, tridex, tritch, trites, tritsch, tritz, trots, trotsky, trout's, trudge, trudges, truths, tryouts, turrets, twardowski, twothirds