mouse eared chickweed vs herb

mouse eared chickweed and herb both are nouns.

Word	Noun	Adjective	Verb	Adverb
mouse eared chickweed	Yes	No	No	No
herb	Yes	No	No	No

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

mouse eared chickweed: any of various plants related to the common chickweed
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 mouse eared chickweed include herbaceous plant.

mouse eared chickweed (noun)	herb (noun)
any of various plants related to the common chickweed	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