agrimonia vs herb

agrimonia and herb both are nouns.

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

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

agrimonia: a plant of the genus Agrimonia having spikelike clusters of small yellow flowers
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 agrimonia include herbaceous plant.

agrimonia (noun)	herb (noun)
a plant of the genus Agrimonia having spikelike clusters of small yellow flowers	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