Stupid
Stupid adjective - Showing or marked by a lack of good sense or judgment.
Usage example: not liking the captain is a stupid reason to quit the team
Thoughtless is a synonym for stupid in irrational topic. In some cases you can use "Thoughtless" instead the word "Stupid" as an adjective or a noun, when it comes to topics like improvident.
Thoughtless
Thoughtless adjective - Showing a lack of manners or consideration for others.
Stupid is a synonym for thoughtless in irrational topic. You can use "Stupid" instead the word "Thoughtless" as an adjective or a noun, if it concerns topics such as unthinking, improvident, absent-minded.
Mutual synonyms
Both words in one sentence
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And it would've been stupid and thoughtless to risk that by rushing into something.
- It is not clear if the government knew what Karl was doing, or if they turned a blind eye to it, but it certainly makes the government come off as stupid and thoughtless.
Source: Why Would Anyone Take Him Back? -
When Family Guy first premiered, Peter Griffin, though stupid and thoughtless, usually had good intentions behind his actions.
Source: Psychopathic Manchild
Cite this Source
Thoughtless and Stupid. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/stupid/thoughtless
Stupid & Thoughtless. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/stupid/thoughtless>.
Thoughtless or Stupid. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/stupid/thoughtless.
Google Ngram Viewer shows how "stupid" and "thoughtless" have occurred on timeline