Agrostis alba vs Poa nemoralis

Agrostis alba and Poa nemoralis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Agrostis alba	Yes	No	No	No
Poa nemoralis	Yes	No	No	No

As nouns, Agrostis alba and Poa nemoralis are synonyms defined as:

Agrostis alba and Poa nemoralis: slender European grass of shady places; grown also in northeastern America and temperate Asia

Other synonyms of Agrostis alba include wood meadowgrass.

Agrostis alba (noun)	Poa nemoralis (noun)
slender European grass of shady places; grown also in northeastern America and temperate Asia	slender European grass of shady places; grown also in northeastern America and temperate Asia