goose grass vs genus Eleusine

goose grass and genus Eleusine both are nouns.

Word	Noun	Adjective	Verb	Adverb
goose grass	Yes	No	No	No
genus Eleusine	Yes	No	No	No

goose grass (noun)	genus Eleusine (noun)
low-growing perennial having leaves silvery beneath; northern United States, Europe, Asia	annual and perennial grasses of savannas and upland grasslands
annual weedy grass used for hay
coarse annual grass having fingerlike spikes of flowers; native to Old World tropics; a naturalized weed elsewhere
annual having the stem beset with curved prickles; North America and Europe and Asia