Zizania aquatica vs wild rice

Zizania aquatica and wild rice both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zizania aquatica	Yes	No	No	No
wild rice	Yes	No	No	No

As nouns, Zizania aquatica and wild rice are synonyms defined as:

Zizania aquatica and wild rice: perennial aquatic grass of North America bearing grain used for food

Zizania aquatica (noun)	wild rice (noun)
perennial aquatic grass of North America bearing grain used for food	grains of aquatic grass of North America
	perennial aquatic grass of North America bearing grain used for food