Keystone
Keystone noun - An immaterial thing upon which something else rests.
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Synonyms for Keystone
Prerequisite and keystone are semantically related. In some cases you can use "Prerequisite" instead a noun "Keystone".
Prerequisite
Prerequisite noun - Something that is required in advance.
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Synonyms for Prerequisite
Keystone and prerequisite are semantically related. Sometimes you can use "Keystone" instead a noun "Prerequisite".
Mutual synonyms
Cite this Source
Prerequisite and Keystone. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/keystone/prerequisite
Keystone & Prerequisite. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/keystone/prerequisite>.
Prerequisite or Keystone. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/keystone/prerequisite.
Google Ngram Viewer shows how "keystone" and "prerequisite" have occurred on timeline