Substantial
Substantial adjective - Having great meaning or lasting effect.
Unchallenging and substantial are semantically related. In some cases you can use "Unchallenging" instead an adjective "Substantial".
Unchallenging
Substantial and unchallenging are semantically related. Sometimes you can use "Substantial" instead an adjective "Unchallenging".
Mutual synonyms
Cite this Source
Unchallenging and Substantial. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/substantial/unchallenging
Substantial & Unchallenging. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/substantial/unchallenging>.
Unchallenging or Substantial. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/substantial/unchallenging.
Google Ngram Viewer shows how "substantial" and "unchallenging" have occurred on timeline