purple sage vs sage

purple sage and sage both are nouns.

Word	Noun	Adjective	Verb	Adverb
purple sage	Yes	No	No	No
sage	Yes	Yes	No	No

As nouns, sage is a hypernym of purple sage; that is, sage is a word with a broader meaning than purple sage:

Other hypernyms of purple sage include salvia.

purple sage (noun)	sage (noun)
silvery-leaved California herb with purple flowers	aromatic fresh or dried grey-green leaves used widely as seasoning for meats and fowl and game etc
	a mentor in spiritual and philosophical topics who is renowned for profound wisdom
	any of various plants of the genus Salvia; a cosmopolitan herb

purple sage (adjective)	sage (adjective)
	of the grey-green color of sage leaves
	having wisdom that comes with age and experience