Synonyms and related words :
airy, blanket, brash, careless, casual, cursory, degage, disregardant, disregardful, easygoing, flippant, forgetful, free and easy, general, heedless, impolitic, imprudent, inconsiderate, indifferent, indiscreet, indiscriminate, indiscriminative, insensitive, insouciant, lazy, maladroit, nonjudgmental, oblivious, offhand, perfunctory, promiscuous, reckless, regardless, respectless, tactless, thoughtless, uncritical, uncriticizing, undemanding, undifferentiating, undiplomatic, undiscreet, undiscriminating, undiscriminative, unexacting, unfastidious, unheedful, unheeding, unmeticulous, unmindful, unparticular, unprepared, unready, unselective, unsolicitous, unsubtle, unthinking, wholesale