Panicum capillare vs witchgrass

Panicum capillare and witchgrass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Panicum capillare	Yes	No	No	No
witchgrass	Yes	No	No	No

As nouns, Panicum capillare and witchgrass are synonyms defined as:

Panicum capillare and witchgrass: North American grass with slender brushy panicles; often a weed on cultivated land

Other synonyms of Panicum capillare include old witch grass, old witchgrass, tumble grass, witch grass.

Panicum capillare (noun)	witchgrass (noun)
North American grass with slender brushy panicles; often a weed on cultivated land	North American grass with slender brushy panicles; often a weed on cultivated land
	European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed