cord grass vs cordgrass

cord grass and cordgrass both are nouns.

Word	Noun	Adjective	Verb	Adverb
cord grass	Yes	No	No	No
cordgrass	Yes	No	No	No

As nouns, cord grass and cordgrass are synonyms defined as:

cord grass and cordgrass: any of several perennial grasses of the genus Spartina; some important as coastal soil binders

cord grass (noun)	cordgrass (noun)
any of several perennial grasses of the genus Spartina; some important as coastal soil binders	any of several perennial grasses of the genus Spartina; some important as coastal soil binders