Substantial and Slight

Opposite meaning words

Substantial adjective - Having great meaning or lasting effect.

Usage example: substantial changes to the school dress code that made a lot of people unhappy

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Slight is an antonym for substantial in topics: important, minor.

Slight adjective - Lacking importance.

Usage example: a slight comedy that did nothing to further her career

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Substantial is an antonym for slight in topics: small, noticeable.

Cite this Source

Slight and Substantial. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/substantial/slight

Substantial & Slight. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/substantial/slight>.

Slight or Substantial. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/substantial/slight.

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