Eons rhymes with:
europeans, europeans', korean's, koreans, koreans', mcgeean's, paeans, peons, plebeians, sheehan's, sofians, tennesseans
Eons sounds like:
eames, eanes, ehmke, einon's, emcee, emch, emco, emens, emge, emick, emig, emigh, eminase, eminence, eminences, emmaus, emmick, emmis, emmons, emmy's, emmys, enasa, encase, enciso, enck, enemas, enemies, enemies', enemy's, enex, eng, engage, engages, enge, engh, enhance, enhances, eniac, enis, enix, enjoy, enjoys, enke, enmesh, enmeshes, ennes, ennis, ennosuke, enns, enoch, enochs, enos, enough, enough's, enqueso, ensco, ensco's, enseco, ensey, ensue, ensues, ensz, enz, enzo, eunice, eunuch, ewing, ewing's, ewings, ewong, eyeing