Foolish and Substantial
Opposite meaning words
Foolish
Foolish adjective - Lacking importance.
Usage example: the current regulations are cluttered with foolish details that are unnecessarily burdensome
Substantial is an antonym for foolish.
Substantial
Substantial adjective - Having great meaning or lasting effect.
Foolish is an antonym for substantial.
Cite this Source
Substantial and Foolish. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/foolish/substantial
Foolish & Substantial. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/foolish/substantial>.
Substantial or Foolish. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/foolish/substantial.
Google Ngram Viewer shows how "foolish" and "substantial" have occurred on timeline