goose grass vs panic grass

goose grass and panic grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
goose grass	Yes	No	No	No
panic grass	Yes	No	No	No

As nouns, panic grass is a hypernym of goose grass; that is, panic grass is a word with a broader meaning than goose grass:

goose grass (noun)	panic grass (noun)
low-growing perennial having leaves silvery beneath; northern United States, Europe, Asia	any grass of the genus Panicum; grown for grain and fodder
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