Synonyms of impassiveness

1 Syllable
lack
2 Syllables
coolness, torpor, disdain, coldness, stoicism
3 Syllables
callousness, aloofness, disregard, heedlessness, listlessness, unconcern, dispassion, apathy, equity, detachment, inertia, lethargy
4 Syllables
disinterest, inattention, nonchalance, insouciance, cold-bloodedness, neutrality, unmindfulness, carelessness, immunity, negligence
5 Syllables
isolationism, impassivity, inconsequence, impartiality, objectivity, indifference, alienation
6 Syllables
noninterference, insensitivity, disinterestedness, inconsequentialness, non-interference
7 Syllables
inconsequentiality