Hernaria glabra vs ground cover

Hernaria glabra and ground cover both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hernaria glabra	Yes	No	No	No
ground cover	Yes	No	No	No

As nouns, ground cover is a hypernym of Hernaria glabra; that is, ground cover is a word with a broader meaning than Hernaria glabra:

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

Other hypernyms of Hernaria glabra include groundcover.

Hernaria glabra (noun)	ground cover (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