nut sedge vs Cyperus rotundus

nut sedge and Cyperus rotundus both are nouns.

Word	Noun	Adjective	Verb	Adverb
nut sedge	Yes	No	No	No
Cyperus rotundus	Yes	No	No	No

As nouns, nut sedge and Cyperus rotundus are synonyms defined as:

nut sedge and Cyperus rotundus: a widely distributed perennial sedge having small edible nutlike tubers

Other synonyms of nut sedge include nut grass, nutgrass, nutsedge.

nut sedge (noun)	Cyperus rotundus (noun)
a widely distributed perennial sedge having small edible nutlike tubers	a widely distributed perennial sedge having small edible nutlike tubers