Formalize and Invalidate

Opposite meaning words

Formalize verb - Declare or make legally valid.

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Invalidate is an antonym for formalize.

Invalidate verb - To put an end to by formal action.

Usage example: those nations eventually invalidated their trade agreement

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Formalize is an antonym for invalidate.

Cite this Source

Invalidate and Formalize. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/formalize/invalidate

Formalize & Invalidate. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/formalize/invalidate>.

Invalidate or Formalize. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/formalize/invalidate.

Google Ngram Viewer shows how "formalize" and "invalidate" have occurred on timeline