Key
Key noun - An explanatory list of the symbols on a map or chart.
Root principle and key are semantically related. In some cases you can use "Root principle" instead a noun "Key".
Root principle
Key and root principle are semantically related. You can use "Key" instead a noun phrase "Root principle".
Mutual synonyms
Cite this Source
Root principle and Key. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/key/root_principle
Key & Root principle. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/key/root_principle>.
Root principle or Key. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/key/root_principle.
Google Ngram Viewer shows how "key" and "root principle" have occurred on timeline