Hypoxis hirsuta vs American star grass

Hypoxis hirsuta and American star grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hypoxis hirsuta	Yes	No	No	No
American star grass	Yes	No	No	No

As nouns, Hypoxis hirsuta and American star grass are synonyms defined as:

Hypoxis hirsuta and American star grass: perennial star grass of North America

Hypoxis hirsuta (noun)	American star grass (noun)
perennial star grass of North America	perennial star grass of North America