Synonyms of nonchalance in English:

nonchalance


See definition of nonchalance

noun

1‘she shrugged, feigning nonchalance’

SYNONYMS

calmness, coolness, insouciance, unconcern, casualness, airiness, sangfroid, calm, indifference, dispassionateness, lack of emotion, composure, detachment, imperturbability

informal one's cool

ANTONYMS

anxiety, concern