nutsedge vs nut grass

nutsedge and nut grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
nutsedge	Yes	No	No	No
nut grass	Yes	No	No	No

As nouns, nutsedge and nut grass are synonyms defined as:

nutsedge and nut grass: a widely distributed perennial sedge having small edible nutlike tubers

Other synonyms of nutsedge include Cyperus rotundus, nut sedge, nutgrass.

nutsedge (noun)	nut grass (noun)
a widely distributed perennial sedge having small edible nutlike tubers	a widely distributed perennial sedge having small edible nutlike tubers