Synonyms of imperturbable

1 Syllable

smug, cool, stoic

2 Syllables

patient, tranquil, placid, cold-fish, stoical

3 Syllables

unmoved, thick-skinned, sedate, nonchalant, cool-headed, serene, unruffled, untouched, assured, iceberg, nerveless, equable, complacent, easy-going, composed, cold-blooded

4 Syllables

immovable, undisturbed, stony-hearted, unaffected, impassive, unexcited, unflappable, self-satisfied, self-possessed, equanimous, stonyhearted, mild-tempered, uncomplaining

5 Syllables

unagitated, unimpressible, disimpassioned, dispassionate, inexcitable, unexcitable