Irradiated rhymes with:
mediated, appreciated, appropriated, asphyxiated, delineated, depreciated, deviated, differentiated, emaciated, enunciated, excoriated, expropriated, humiliated, mediated, misappropriated, permeated, recreated, renegotiated, repatriated, retaliated, substantiated, unaffiliated, unappreciated, undifferentiated, uninitiated, unsubstantiated
Irradiated sounds like:
ierardi, irate, ireta, iretta, irette, irit, irradiate, irrawaddy, irritate, irritated