Synonyms to light-hearted

blase, Laodicean, Olympian, aloof, apathetic, ataractic, benumbed, blah, bored, carefree, careless, casual, comatose, cool, cosmopolitan, cosmopolite, dead, debilitated, degage, desensitized, detached, devil-may-care, disabused, disappointed, disenchanted, disillusioned, disinterested, dispassionate, dispirited, disregardful, dopey, dormant, droopy, drugged, dull, easy, easygoing, emotionless, enervated, enlightened, exanimate, experienced, fed-up, free and easy, good and tired, heartless, heavy, hebetudinous, heedless, hopeless, in a stupor, inanimate, inattentive, incurious, indifferent, inert, inexcitable, insouciant, irked, jaded, knowing, lackadaisical, languid, languorous, leaden, lethargic, life-weary, lifeless, listless, lumpish, mature, matured, melancholic, melancholy, mindless, mondaine, moribund, negligent, nonchalant, not born yesterday, numb, numbed, offhand, old, passive, perfunctory, phlegmatic, pluckless, pococurante, pooped, practiced, put straight, reckless, regardless, resigned, ripe, ripened, robbed of illusion, sagacious, sated, satiated, seasoned, set right, sick, sick of, sl