88 entries under casual topic. ×

34
thoughtless(adjective, sharp, rough, rude, careless)
27
heedless(adjective, sharp, rude, careless, indifferent)
22
careless(adjective, sharp, rough, indifferent, silly)
21
mindless(adjective, dull, simple, wrong, slow)
18
spontaneous(adjective, careless, natural, emotional)
17
reckless(adjective, careless, foolish, careful)
16
inconsiderate(adjective, sharp, rough, rude, careless)
16
unconscious(adjective, careless, cold, indifferent, natural)
16
unmindful(adjective, sharp, rude, careless, indifferent)
15
imprudent(adjective, careless, thoughtless, impulsive)
13
hasty(adjective, sharp, rough, rude, careless)
13
unpremeditated(adjective, careless, impulsive, instinctive)
12
inadvertent(adjective, careless, indifferent, foolish, stupid)
12
incautious(adjective, careless, foolish, careful)
12
negligent(adjective, sharp, rude, careless, indifferent)
11
indiscreet(adjective, dull, sharp, rough, rude)
11
unheeding(adjective, sharp, rude, careless, indifferent)
11
unreflective(adjective, careless, stupid, inattention)
8
forgetful(adjective, careless, indifferent, silly, foolish)
8
unconsidered(adjective, careless, foolish, rash)
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APASmart Define. (2015). unthinking thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unthinking/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthinking thesaurus" https://smartdefine.org/unthinking/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unthinking thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unthinking/thesaurus/synonyms>.
MLASmart Define. "unthinking thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/unthinking/thesaurus/synonyms>