Sporobolus poiretii vs blackseed

Sporobolus poiretii and blackseed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sporobolus poiretii	Yes	No	No	No
blackseed	Yes	No	No	No

As nouns, Sporobolus poiretii and blackseed are synonyms defined as:

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

Other synonyms of Sporobolus poiretii include carpet grass, smut grass.

Sporobolus poiretii (noun)	blackseed (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