Ruthless
Ruthless adjective - Having or showing a lack of sympathy or tender feelings.
Usage example: an office supervisor with a ruthless disregard for others' feelings
Thoughtless and ruthless are semantically related. In some cases you can use "Thoughtless" instead an adjective "Ruthless".
Nearby Words: ruthlessly, ruth
Thoughtless
Thoughtless adjective - Showing a lack of manners or consideration for others.
Ruthless and thoughtless are semantically related. Sometimes you can use "Ruthless" instead an adjective "Thoughtless".
Mutual synonyms
Both words in one sentence
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Essentially, she comes off as spoiled and thoughtless but not really deserving of death particularly since she turns out to have been the victim of a rather ruthless and meticulously planned murder.
Source: Literature / Death on the Nile
Cite this Source
Thoughtless and Ruthless. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/ruthless/thoughtless
Ruthless & Thoughtless. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/ruthless/thoughtless>.
Thoughtless or Ruthless. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/ruthless/thoughtless.
Google Ngram Viewer shows how "ruthless" and "thoughtless" have occurred on timeline