hardstemmed bulrush vs Scirpus acutus

hardstemmed bulrush and Scirpus acutus both are nouns.

Word	Noun	Adjective	Verb	Adverb
hardstemmed bulrush	Yes	No	No	No
Scirpus acutus	Yes	No	No	No

As nouns, hardstemmed bulrush and Scirpus acutus are synonyms defined as:

hardstemmed bulrush and Scirpus acutus: widely distributed North American sedge having rigid olive green stems

Other synonyms of hardstemmed bulrush include hardstem bulrush.

hardstemmed bulrush (noun)	Scirpus acutus (noun)
widely distributed North American sedge having rigid olive green stems	widely distributed North American sedge having rigid olive green stems