blackseed vs carpet grass

blackseed and carpet grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackseed	Yes	No	No	No
carpet grass	Yes	No	No	No

As nouns, blackseed and carpet grass are synonyms defined as:

blackseed and carpet grass: grass native to West Indies but common in southern United States having tufted wiry stems often infested with a dark fungus

Other synonyms of blackseed include smut grass, Sporobolus poiretii.

blackseed (noun)	carpet grass (noun)
grass native to West Indies but common in southern United States having tufted wiry stems often infested with a dark fungus	grass native to West Indies but common in southern United States having tufted wiry stems often infested with a dark fungus