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