Synonym of thoughtless

inconsiderate unkind uncaring selfish insensitive tactless rude impolite antisocial boorish indiscreet reckless apathetic asocial blind brash deaf discourteous egocentric hasty heedless hot-headed inattentive incautious indelicate indifferent listless madcap neglectful negligent primitive rash self-centered sharp short unceremonious unconcerned undiplomatic ungracious unheeding unmindful unrefined

careless unthinking foolish stupid absent-minded unobservant ill-advised ill-considered irrational mindless senseless bovine confused doltish dull empty-headed flighty imprudent inadvertent inane incomprehensible inept injudicious irreflective lamebrained loony obtuse puerile regardless remiss silly undiscerning unreasonable unreasoning unreflective vacuous witless