Stellaria holostea vs chickweed

Stellaria holostea and chickweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stellaria holostea	Yes	No	No	No
chickweed	Yes	No	No	No

As nouns, chickweed is a hypernym of Stellaria holostea; that is, chickweed is a word with a broader meaning than Stellaria holostea:

Stellaria holostea: low-growing north temperate herb having small white star-shaped flowers; named for its alleged ability to ease sharp pains in the side
chickweed: any of various plants of the genus Stellaria

Stellaria holostea (noun)	chickweed (noun)
low-growing north temperate herb having small white star-shaped flowers; named for its alleged ability to ease sharp pains in the side	any of various plants of the genus Stellaria
	any of various plants related to the common chickweed