Unbreakable rhymes with:
breakable, breakable, breakable, unmistakable, unshakable, unshakeable, amicable, applicable, bankable, breakable, communicable, despicable, drinkable, eradicable, explicable, extricable, impeccable, implacable, impracticable, inapplicable, ineradicable, inextricable, irrevocable, likable, likeable, practicable, remarkable, revocable, talkable, unmistakable, unremarkable, unshakable, unshakeable, unsinkable, unspeakable, unthinkable, unworkable, workable
Unbreakable sounds like:
unenforceable, unforeseeable, unforgivable