sage vs herb

sage and herb both are nouns.

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

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

sage: aromatic fresh or dried grey-green leaves used widely as seasoning for meats and fowl and game etc
herb: aromatic potherb used in cookery for its savory qualities

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

sage: any of various plants of the genus Salvia; a cosmopolitan herb
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

Other hypernyms of sage include herbaceous plant.

sage (noun)	herb (noun)
aromatic fresh or dried grey-green leaves used widely as seasoning for meats and fowl and game etc	aromatic potherb used in cookery for its savory qualities
a mentor in spiritual and philosophical topics who is renowned for profound wisdom	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
any of various plants of the genus Salvia; a cosmopolitan herb

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