Coriandrum sativum vs herb

Coriandrum sativum and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Coriandrum sativum	Yes	No	No	No
herb	Yes	No	No	No

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

Coriandrum sativum: Old World herb with aromatic leaves and seed resembling parsley
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 Coriandrum sativum include herbaceous plant.

Coriandrum sativum (noun)	herb (noun)
Old World herb with aromatic leaves and seed resembling parsley	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