Key
Key noun - An explanatory list of the symbols on a map or chart.
Principal element and key are semantically related. In some cases you can use "Principal element" instead a noun "Key".
Principal element
Key and principal element are semantically related. Sometimes you can use "Key" instead a noun phrase "Principal element".
Mutual synonyms
Cite this Source
Principal element and Key. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/key/principal_element
Key & Principal element. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/key/principal_element>.
Principal element or Key. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/key/principal_element.
Google Ngram Viewer shows how "key" and "principal element" have occurred on timeline