Synonyms of the word 
NONCHALANCE → CAREFREENESS - INDIFFERENCE - UNCONCERN
nonchalance
- n. indifference; carelessness; coolness; disregard, detachment.
carefreeness
- n. The property of being lighthearted, joyous, cheerful, without a care.
indifference
- n. The state of being indifferent.
- n. Unbiased impartiality.
- n. Unemotional apathy.
- n. A lack of enthusiasm.
- n. Unconcerned nonchalance.
unconcern
- n. (nonstandard, obsolete) indifference or lack of concern.
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