greater stitchwort vs chickweed

greater stitchwort and chickweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
greater stitchwort	Yes	No	No	No
chickweed	Yes	No	No	No

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

greater stitchwort: 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

greater stitchwort (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