Irrevocable rhymes with:
revocable, revocable, revocable, applicable, communicable, eradicable, ineradicable, practicable, revocable, amicable, applicable, bankable, breakable, communicable, despicable, drinkable, eradicable, explicable, extricable, impeccable, implacable, impracticable, inapplicable, ineradicable, inextricable, likable, likeable, practicable, remarkable, revocable, talkable, unbreakable, unmistakable, unremarkable, unshakable, unshakeable, unsinkable, unspeakable, unthinkable, unworkable, workable