Keystone
Keystone noun - An immaterial thing upon which something else rests.
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Precedent and Keystone. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/keystone/precedent
Keystone & Precedent. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/keystone/precedent>.
Precedent or Keystone. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/keystone/precedent.
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