Arch
Arch adjective - Coming before all others in importance.
Usage example: since the start of her acting career her parents have steadfastly remained her arch supporters
Leading is a synonym for arch in position topic. In some cases you can use "Leading" instead an adjective "Arch", when it comes to topics like principal.
Mutual synonyms
Both words in one sentence
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There's also Sigma's invasion of other worlds: So far, he's managed to piss off Astaroth and Wizeman, leading them to send Firebrand and Reala with the heroes and their usual arch-nemesis.
- There were regular gags about Rachel's pre-surgery nose, leading eventually to a flashback episode in which a teenage Rachel appeared with an enormous arch on the bridge of her nose.
Source: Running Gag / Live-Action TV - The twist however, is that his friends and family are killed in an explosion, leading his arch enemy Vlad to take him in.
Source: Tragic Hero
Cite this Source
Leading and Arch. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/arch/leading
Arch & Leading. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/arch/leading>.
Leading or Arch. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/arch/leading.
Google Ngram Viewer shows how "arch" and "leading" have occurred on timeline