Agrostis canina vs velvet bent grass

Agrostis canina and velvet bent grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Agrostis canina	Yes	No	No	No
velvet bent grass	Yes	No	No	No

As nouns, Agrostis canina and velvet bent grass are synonyms defined as:

Agrostis canina and velvet bent grass: common grass with slender stems and narrow leaves

Other synonyms of Agrostis canina include brown bent, dog bent, Rhode Island bent, velvet bent.

Agrostis canina (noun)	velvet bent grass (noun)
common grass with slender stems and narrow leaves	common grass with slender stems and narrow leaves