Synonyms of nonchalance

2 Syllables
coolness, aplomb
3 Syllables
callousness, disregard, casualness, easiness, unconcern, coolnesses
4 Syllables
lightheartedness, insouciance, cold-bloodedness, composure, unmindfulness, haphazardness, carelessness, easygoingness
5 Syllables
impassiveness, isolationism, inconsequence, indifference, informality
6 Syllables
noninterference, insensitivity, unflappability, inconsequentialness, non-interference
7 Syllables
inconsequentiality, imperturbability, inexcitability