1. (adj)thoughtless showing lack of careful thought Synonyms: uncaring, unthinking Antonyms: bemused, lost(p), pondering, considerate, cogitative, brooding, deliberative, meditative, deep in thought(p), well thought out(p), reflective, broody, musing, pensive, contemplative, preoccupied, ruminative, excogitative, thoughtful
2. (adj)thoughtless, uncaring, unthinking without care or thought for others Synonyms: unthinking, lumpen, unaffectionate, detached, lumpish, uncaring, unthoughtful, thoughtless, unreflective Antonyms: deliberative, broody, ruminative, pondering, considerate, musing, well thought out(p), lost(p), meditative, pensive, thoughtful, reflective, cogitative, bemused, preoccupied, contemplative, excogitative, brooding, deep in thought(p)
Synonyms, Thesaurus & Antonyms of 'thoughtless'
English Synonyms and Antonyms
1. thoughtless As regards mental action, absorbed, abstracted, and preoccupied refer to the cause, absent or absent-minded to the effect. The man absorbed in one thing will appear absent in others. A Synonyms: abstracted, absent, heedless, listless, preoccupied, absent-minded, inattentive, negligent, thoughtless, absorbed, indifferent, oblivious Antonyms: alert, on hand, ready, wide-awake, attentive, prompt, thoughtful
Synonyms for thoughtless 
