18 nonchalant synonyms include calm, cool, unconcerned, collected, and collected, cool as a cucumber, composed, airy, indifferent, and unemotional. Nonchalant is an adjective, and its antonyms are anxious and concerned. Here are some additional synonyms for "nonchalant" with example sentences.
18 other ways to say nonchalant.
A nonchalant smile concealed his nervousness.
He gave a nonchalant shrug yesterday.
She acted nonchalant despite the chaos.
They remained nonchalant about the outcome.