Idea's rhymes with:
ideas, ideas, aerovias, casias, covarrubias, diarrheas, dobias, encinias, frias, galerias, garcia's, garcias, gia's, hosea's, ideas, korea's, lia's, maria's, mejias, pizzerias, shias, sofia's, tortillas, urias, zacarias, zia's
Idea's sounds like:
idaho's, ideas, idec, idiocy, idiotic, idiots, iodice, iodide's, iodides, it's, itasca, itch, itches, itchy, itek, ithaca, ithaca's, ito's, itochu, its, itsy, itzhak