Impetus
Proof
Proof noun - Something presented in support of the truth or accuracy of a claim.
How words are described
Both words in one sentence
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Ripple Effect-Proof Memory: Alex changes history, but doesn't change his memory of history, even though his original impetus for using the time machine was altered when he first used it.
Source: Film / The Time Machine (2002)
Cite this Source
Proof and Impetus. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impetus/proof
Impetus & Proof. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impetus/proof>.
Proof or Impetus. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impetus/proof.
Google Ngram Viewer shows how "impetus" and "proof" have occurred on timeline