Erstwhile and Noachian

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Erstwhile adjective - Having been such at some previous time.

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Noachian and erstwhile are semantically related. In some cases you can use "Noachian" instead an adjective "Erstwhile".

Noachian adjective - Having passed its time of use or usefulness.

Usage example: Noachian farm equipment that probably belongs in a museum somewhere

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Erstwhile and Noachian are semantically related. Sometimes you can use "Erstwhile" instead an adjective "Noachian".

Cite this Source

Noachian and Erstwhile. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/erstwhile/noachian

Erstwhile & Noachian. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/erstwhile/noachian>.

Noachian or Erstwhile. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/erstwhile/noachian.

Google Ngram Viewer shows how "erstwhile" and "Noachian" have occurred on timeline