Antonyms of noun thoughtfulness

2 of 4 senses of thoughtfulness

Sense 2
consideration, considerateness, thoughtfulness -- (kind and considerate regard for others; "he showed no consideration for her feelings")
       Antonym of thoughtlessness (Sense 1)
      => inconsideration, inconsiderateness, thoughtlessness -- (the quality of failing to be considerate of others)

Sense 3
thoughtfulness -- (the trait of thinking carefully before acting)
       Antonym of unthoughtfulness (Sense 1)
      => unthoughtfulness, thoughtlessness -- (the trait of not thinking carefully before acting)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun thoughtfulness

4 senses of thoughtfulness

Sense 1
contemplation, reflection, reflexion, rumination, musing, thoughtfulness -- (a calm, lengthy, intent consideration)
       => consideration -- (the process of giving careful thought to something)

Sense 2
consideration, considerateness, thoughtfulness -- (kind and considerate regard for others; "he showed no consideration for her feelings")
       => kindness -- (the quality of being warmhearted and considerate and humane and sympathetic)

Sense 3
thoughtfulness -- (the trait of thinking carefully before acting)
       => trait -- (a distinguishing feature of your personal nature)

Sense 4
consideration, thoughtfulness -- (a considerate and thoughtful act)
       => kindness, benignity -- (a kind act)