Substantial
Substantial adjective - Of a size greater than average of its kind.
Usage example: the amount he inherited was quite substantial, so he quit his job and set out to see the world
Vast is a synonym for substantial in important topic. In some cases you can use "Vast" instead an adjective "Substantial".
Vast
Vast adjective - Unusually large.
Usage example: a vast expanse of land just waiting to be settled
Mutual synonyms
Related pairs
Both words in one sentence
- After all, the vast majority of his blackmail schemes wouldn't work if the targets didn't have some fairly substantial skeletons in their closets.
- The Lost Experience was a vast and complicated one that delivered substantial amounts of information about Lost's mythology.
Source: Alternate Reality Game - Corvo may have a vast array of powers, but when it comes down to it, he's still physically an ordinary human - getting in a scrap with guards and getting shot, or falling a long distance without breaking it via blink will do substantial if not fatal damage to you.
Source: Reality Ensues / Video Games
Cite this Source
Vast and Substantial. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/substantial/vast
Substantial & Vast. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/substantial/vast>.
Vast or Substantial. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/substantial/vast.
Google Ngram Viewer shows how "substantial" and "vast" have occurred on timeline