Callous
Callous adjective - Having or showing a lack of sympathy or tender feelings.
Relentless and callous are semantically related in severe topic. In some cases you can use "Relentless" instead an adjective "Callous".
Relentless
Relentless adjective - Showing no signs of slackening or yielding in one's purpose.
Callous and relentless are semantically related in behaviour topic. Sometimes you can use "Callous" instead an adjective "Relentless", if it concerns topics such as severe.
Nearby Word: relentlessly
Mutual synonyms
Related pairs
Both words in one sentence
- It's his callous indifference to the suffering that would come along with it, and his relentless willingness to do whatever it would take to accomplish his goal, no matter who gets hurt that makes Paul realize he needs to be stopped.
Source: Sliding Scale of Anti-Villains
Cite this Source
Relentless and Callous. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/callous/relentless
Callous & Relentless. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/callous/relentless>.
Relentless or Callous. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/callous/relentless.
Google Ngram Viewer shows how "callous" and "relentless" have occurred on timeline