Another word for indifference
unconcern, nonchalance, aloofness, impassiveness, impassivity, impassibility, coldness, coolness, insensitivity, insensibility, callousness, alienation, disregard, disinterest, insouciance, noninterference, inertia, neutrality, isolationism, insusceptibility, immunity, phlegm, heedlessness, detachment, dullness, sluggishness, listlessness, torpor, stupor, cold-bloodedness, disdain, stoicism, cool*.
Another word for indifferencenoun
Lack of importance:inconsequence, inconsequentiality, inconsequentialness, insignificance, insignificancy, unimportance. See concern
Lack of emotion or interest:apathy, disinterest, impassivity, incuriosity, incuriousness, insensibility, insensibleness, lassitude, lethargy, listlessness, phlegm, stolidity, stolidness, unconcern, uninterest, unresponsiveness. See feelings