common rush vs Juncus effusus

common rush and Juncus effusus both are nouns.

Word	Noun	Adjective	Verb	Adverb
common rush	Yes	No	No	No
Juncus effusus	Yes	No	No	No

As nouns, common rush and Juncus effusus are synonyms defined as:

common rush and Juncus effusus: tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America

Other synonyms of common rush include bullrush, bulrush, soft rush.

common rush (noun)	Juncus effusus (noun)
tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America	tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America