Synonyms of nonchalance in English:

nonchalance


See US English definition of nonchalance

See UK English definition of nonchalance

See Spanish definition of despreocupación

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