Elettaria cardamomum vs herb

Elettaria cardamomum and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Elettaria cardamomum	Yes	No	No	No
herb	Yes	No	No	No

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

Elettaria cardamomum: rhizomatous herb of India having aromatic seeds used as seasoning
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 Elettaria cardamomum include herbaceous plant.

Elettaria cardamomum (noun)	herb (noun)
rhizomatous herb of India having aromatic seeds used as seasoning	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