Cynoglossum amabile vs herb

Cynoglossum amabile and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cynoglossum amabile	Yes	No	No	No
herb	Yes	No	No	No

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

Cynoglossum amabile: biennial east Asian herb grown for its usually bright blue 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 Cynoglossum amabile include herbaceous plant.

Cynoglossum amabile (noun)	herb (noun)
biennial east Asian herb grown for its usually bright blue 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