common rush vs soft rush

common rush and soft rush both are nouns.

Word	Noun	Adjective	Verb	Adverb
common rush	Yes	No	No	No
soft rush	Yes	No	No	No

As nouns, common rush and soft rush are synonyms defined as:

common rush and soft rush: 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, Juncus effusus.

common rush (noun)	soft rush (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