Synonyms of unshakable

1 Syllable

firm, mule

2 Syllables

stubborn, surer, ballsy, rocker, brass-bound, brassbound, bullhead, fixed, solid, surest, dogged

3 Syllables

uncompliant, inferred, hard-hearted, persistent, stiff-necked, bulldogged, unfearing, implicit, adamant, unafraid, tenacious, shatterproof, abiding

4 Syllables

unbreakable, immovable, unfrightened, impregnable, surefire, obdurate, unwavering, unsinkable, resolute, unflappable, inflexible, unforgetful, unbendable, infrangible, nonbreakable, unquestioning, established

5 Syllables

unhesitating, uncontestable

6 Syllables

incontrovertible, perseverative