ground cover vs botany

ground cover and botany both are nouns.

Word	Noun	Adjective	Verb	Adverb
ground cover	Yes	No	No	No
botany	Yes	No	No	No

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

ground cover: low-growing plants planted in deep shade or on a steep slope where turf is difficult to grow
botany: all the plant life in a particular region or period

Other hypernyms of ground cover include flora, vegetation.

ground cover (noun)	botany (noun)
small plants other than saplings growing on a forest floor	the branch of biology that studies plants
low-growing plants planted in deep shade or on a steep slope where turf is difficult to grow	all the plant life in a particular region or period