Relentless
Relentless adjective - Showing no signs of slackening or yielding in one's purpose.
Sure and relentless are semantically related. In some cases you can use "Sure" instead an adjective "Relentless".
Nearby Word: relentlessly
Sure
Sure adjective - Impossible to avoid or evade.
Usage example: the joke's a sure dud if you don't pause in the right places
Relentless and sure are semantically related. Sometimes you can use "Relentless" instead an adjective "Sure".
Nearby Word: surely
Mutual synonyms
Both words in one sentence
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Elmyra's relentless pursuit of Fifi; sure, she wants anything cute and furry, but Elmyra persists after getting skunked several times, and even dressed as Pepe Le Pew, Fifi's crush (and Spear Counterpart), to lure Fifi to her.
Source: Ho Yay / Western Animation
Cite this Source
Sure and Relentless. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/relentless/sure
Relentless & Sure. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/relentless/sure>.
Sure or Relentless. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/relentless/sure.
Google Ngram Viewer shows how "relentless" and "sure" have occurred on timeline