Agropyron repens vs dog grass

Agropyron repens and dog grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Agropyron repens	Yes	No	No	No
dog grass	Yes	No	No	No

As nouns, Agropyron repens and dog grass are synonyms defined as:

Agropyron repens and dog grass: European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed

Other synonyms of Agropyron repens include couch grass, quack grass, quackgrass, quick grass, witch grass, witchgrass.

Agropyron repens (noun)	dog grass (noun)
European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed	European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed