19
thoughtless(adjective, sharp, rude, cold, indifferent)
16
unthinking(adjective, careful, courtesy, thoughtless)
13
inconsiderate(adjective, sharp, rude, cold, indifferent)
11
heedless(adjective, sharp, rude, cold, indifferent)
9
unmindful(adjective, sharp, rude, cold, indifferent)
8
inattentive(adjective, sharp, rude, cold, indifferent)
7
careless(adjective, cold, forget, uncaring, inattentive)
7
mindless(adjective, thoughtless)
7
negligent(adjective, sharp, rude, cold, indifferent)
6
disregardful(adjective, careful, courtesy, thoughtless)
6
unheeding(adjective, cold, forget, thoughtless, uncaring)
6
unkind(adjective, sharp, rude, indifferent, short)
6
unreflective
5
forgetful(adjective, cold, forget, uncaring, inattentive)
5
inadvertent(adjective, cold, forget, uncaring, inattentive)
5
insensitive(adjective, thoughtless)
5
neglectful(adjective, sharp, rude, cold, indifferent)
5
unheedful(adjective, cold, forget, uncaring, inattentive)
5
unobliging(adjective, cold, forget, uncaring, inattentive)
5
unreasonable(adjective, thoughtless)
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APASmart Define. (2015). unthoughtful thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unthoughtful/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthoughtful thesaurus" https://smartdefine.org/unthoughtful/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, unthoughtful thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unthoughtful/thesaurus/synonyms>.
MLASmart Define. "unthoughtful thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/unthoughtful/thesaurus/synonyms>