Unshakeable rhymes with:
unshakable, unshakable, unshakable, breakable, unbreakable, unmistakable, unshakable, 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, unsinkable, unspeakable, unthinkable, unworkable, workable
Unshakeable sounds like:
uncivil, uncouple, unmanageable, unshakable, unsuccessful, unsuccessfully, unusable