yellow nutgrass vs rush nut

yellow nutgrass and rush nut both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow nutgrass	Yes	No	No	No
rush nut	Yes	No	No	No

As nouns, yellow nutgrass and rush nut are synonyms defined as:

yellow nutgrass and rush nut: European sedge having small edible nutlike tubers

Other synonyms of yellow nutgrass include chufa, Cyperus esculentus, earth almond, ground almond.

yellow nutgrass (noun)	rush nut (noun)
European sedge having small edible nutlike tubers	European sedge having small edible nutlike tubers