reed canary grass vs ribbon grass

reed canary grass and ribbon grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
reed canary grass	Yes	No	No	No
ribbon grass	Yes	No	No	No

As nouns, reed canary grass and ribbon grass are synonyms defined as:

reed canary grass and ribbon grass: perennial grass of marshy meadows and ditches having broad leaves; Europe and North America

Other synonyms of reed canary grass include gardener's garters, lady's laces, Phalaris arundinacea.

reed canary grass (noun)	ribbon grass (noun)
perennial grass of marshy meadows and ditches having broad leaves; Europe and North America	perennial grass of marshy meadows and ditches having broad leaves; Europe and North America