krigia vs herb

krigia and herb both are nouns.

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

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

krigia: any small branched yellow-flowered North American herb of the genus Krigia
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 krigia include herbaceous plant.

krigia (noun)	herb (noun)
any small branched yellow-flowered North American herb of the genus Krigia	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