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Noun: thoughtlessness  thot-lus-nus
  1. The quality of failing to be considerate of others
    - inconsideration, inconsiderateness
     
  2. The trait of not thinking carefully before acting
    - unthoughtfulness

Derived forms: thoughtlessnesses

See also: inconsiderate, thoughtless

Type of: trait, unkindness

Antonym: thoughtfulness

Nearest

thought
thought experiment
thought process
thought transference
thoughtful
thoughtfully
thoughtfulness
thought-image
thoughtless
thoughtlessly
thoughtlessness
thought-provoking
thought-reader
thousand
Thousand and One Nights
Thousand Island dressing
thousand times
thousand-fold
thousandth
Thrace
Thracian