salvia vs herbaceous plant

salvia and herbaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
salvia	Yes	No	No	No
herbaceous plant	Yes	No	No	No

As nouns, herbaceous plant is a hypernym of salvia; that is, herbaceous plant is a word with a broader meaning than salvia:

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

Other hypernyms of salvia include herb.

salvia (noun)	herbaceous plant (noun)
any of various plants of the genus Salvia; a cosmopolitan herb	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests