monarda vs herb

monarda and herb both are nouns.

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

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

monarda: any of various aromatic herbs of the genus Monarda
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 monarda include herbaceous plant.

monarda (noun)	herb (noun)
any of various aromatic herbs of the genus Monarda	aromatic potherb used in cookery for its savory qualities
	a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests