gramma vs gramma grass

gramma and gramma grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
gramma	Yes	No	No	No
gramma grass	Yes	No	No	No

As nouns, gramma and gramma grass are synonyms defined as:

gramma and gramma grass: pasture grass of plains of South America and western North America

Other synonyms of gramma include grama, grama grass.

gramma (noun)	gramma grass (noun)
pasture grass of plains of South America and western North America	pasture grass of plains of South America and western North America