Incidental
Incidental adjective - Lacking importance.
Usage example: we still have to work out a few incidental details, but the proposal is largely complete
Substantial is an antonym for incidental.
Substantial
Substantial adjective - Having great meaning or lasting effect.
Incidental is an antonym for substantial.
Both words in one sentence
- That game zig zags it though: King Alistair only makes the same very small cameo (though he's also referenced more in codex entries and incidental NPC chatter than Anora), while Warden Alistair has a substantial role in one of the main plot lines.
Source: Story Branch Favoritism
Cite this Source
Substantial and Incidental. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/incidental/substantial
Incidental & Substantial. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/incidental/substantial>.
Substantial or Incidental. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/incidental/substantial.
Google Ngram Viewer shows how "incidental" and "substantial" have occurred on timeline