Uninitiated rhymes with:
appreciated, depreciated, differentiated, emaciated, renegotiated, substantiated, unappreciated, undifferentiated, unsubstantiated, appreciated, appropriated, asphyxiated, delineated, depreciated, deviated, differentiated, emaciated, enunciated, excoriated, expropriated, humiliated, irradiated, mediated, misappropriated, permeated, recreated, renegotiated, repatriated, retaliated, substantiated, unaffiliated, unappreciated, undifferentiated, unsubstantiated
Uninitiated sounds like:
uinta, unaided, unamended, unanimity, unaudited, und, undated, undid, undo, undue, unedited, unheeded, unimate, unimedia, unit, unita, unite, united, unity, unmade, unmanned, unmet, unnamed, unneeded, unted, untidy, untie, untied, untiedt, unto, unwanted, unwed, unwind, unwound