soft rush vs common rush

soft rush and common rush both are nouns.

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

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

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

Other synonyms of soft rush include bullrush, bulrush, Juncus effusus.

soft rush (noun)	common 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