Substantial and Significant

Substantial

Substantial adjective - Having great meaning or lasting effect.
Usage example: substantial changes to the school dress code that made a lot of people unhappy

Significant is a synonym for substantial in important topic. In some cases you can use "Significant" instead an adjective "Substantial", when it comes to topics like sizeable, considerable, hefty, sizable. popular alternative

Significant

Significant adjective - Having great meaning or lasting effect.
Usage example: made a significant change in the procedure for applying for citizenship

Substantial is a synonym for significant in important topic. You can use "Substantial" instead an adjective "Significant", if it concerns topics such as hefty, sizable, sizeable. popular alternative

Cite this Source
Significant and Substantial. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/substantial/significant
Substantial & Significant. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/substantial/significant>.
Significant or Substantial. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/substantial/significant.
Google Ngram Viewer shows how "substantial" and "significant" have occurred on timeline