rupturewort vs groundcover

rupturewort and groundcover both are nouns.

Word	Noun	Adjective	Verb	Adverb
rupturewort	Yes	No	No	No
groundcover	Yes	No	No	No

As nouns, groundcover is a hypernym of rupturewort; that is, groundcover is a word with a broader meaning than rupturewort:

rupturewort: common prostrate Old World herb often used as a ground cover; formerly reputed to cure ruptures
groundcover: low-growing plants planted in deep shade or on a steep slope where turf is difficult to grow

Other hypernyms of rupturewort include ground cover.

rupturewort (noun)	groundcover (noun)
common prostrate Old World herb often used as a ground cover; formerly reputed to cure ruptures	small plants other than saplings growing on a forest floor
	low-growing plants planted in deep shade or on a steep slope where turf is difficult to grow