Frivolous and Substantial

Opposite meaning words

Frivolous adjective - Lacking importance.

Usage example: judges are getting sick of people bringing frivolous lawsuits

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Substantial is an antonym for frivolous.

Nearby Words: frivolity, frivolously

Substantial adjective - Having great meaning or lasting effect.

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Frivolous is an antonym for substantial.

Cite this Source

Substantial and Frivolous. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/frivolous/substantial

Frivolous & Substantial. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/frivolous/substantial>.

Substantial or Frivolous. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/frivolous/substantial.

Google Ngram Viewer shows how "frivolous" and "substantial" have occurred on timeline