Yoy rhymes with:
ahoy, alroy, annoy, bolshoi, boy, boye, broy, choi, choy, cloy, coy, coye, croix, croy, deboy, decoy, dejoy, deploy, destroy, doi, elroy, employ, enjoy, flournoy, floy, foie, foy, foye, goy, hoi, hoy, hoye, illinois, joy, joye, knoy, kroy, laboy, lacroix, lafoy, lavoy, loy, loye, malloy, mccloy, mccoy, mckoy, mcroy, mcvoy, moy, moye, neu, oi, oie, oy, oye, ploy, polloi, quemoy, redeploy, roi, roy, roye, savoy, scheu, sgroi, soy, stoy, toy, toye, troy, underemploy, unemploy, woy
Yoy sounds like:
y, y., ya, yah, yahi, yahoo, yahweh, yahya, yao, yau, yaw, yay, ye, ye-yi, yea, yeah, yee, yeh, yehiya, yeo, yew, yi, yie, yo, yoe, yoh, yohe, yohei, yoho, yoo, you, yow, yoyo, yu, yue