2
empty-headed(adjective, thoughtless)
2
fatuous(adjective, thoughtless)
2
hard-hearted
2
heartless
2
impolite(adjective, sharp, rude, indifferent, short)
2
improvident
2
irrational
2
listless(adjective, thoughtless)
2
primitive(adjective, thoughtless)
2
senseless
2
undiscerning
2
unrefined(adjective, sharp, rude, indifferent, short)
2
unreflecting
2
unsympathetic
2
vacuous(adjective, thoughtless)
2
witless
1
arbitrary
1
coldhearted
1
discourteous(adjective, sharp, rude, indifferent, short)
1
ill-advised
11 years ago|2.9k views|share |citing 
APASmart Define. (2015). unthoughtful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unthoughtful/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthoughtful thesaurus" https://smartdefine.org/unthoughtful/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unthoughtful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unthoughtful/thesaurus/synonyms>.
MLASmart Define. "unthoughtful thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unthoughtful/thesaurus/synonyms>