Basement
Basement noun - The lowest part, place, or point.
Usage example: the basement of the outdoor fountain needs a lot of restoration work
Keystone
Keystone noun - An immaterial thing upon which something else rests.
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Synonyms for Keystone
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Keystone and Basement. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/basement/keystone
Basement & Keystone. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/basement/keystone>.
Keystone or Basement. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/basement/keystone.
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