thoughtless

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

Antonyms: considerate kind thinking thoughtful unselfish

Synonyms: bovine careless confused doltish dull emptyheaded flighty foolish heedless ill-advised ill-considered imprudent inadvertent inane inattentive incomprehensible inept injudicious irrational irreflective lamebrained loony mindless neglectful negligent obtuse puerile rash reckless regardless remiss senseless silly stupid undiscerning unheeding unmindful unreasonable unreasoning unreflective unthinking vacuous witless

Antonyms: attentive heeding mindful observant thoughtful