ribbon grass vs lady's laces

ribbon grass and lady's laces both are nouns.

Word	Noun	Adjective	Verb	Adverb
ribbon grass	Yes	No	No	No
lady's laces	Yes	No	No	No

As nouns, ribbon grass and lady's laces are synonyms defined as:

ribbon grass and lady's laces: perennial grass of marshy meadows and ditches having broad leaves; Europe and North America

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

ribbon grass (noun)	lady's laces (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