scouring rush vs Equisetum robustum

scouring rush and Equisetum robustum both are nouns.

Word	Noun	Adjective	Verb	Adverb
scouring rush	Yes	No	No	No
Equisetum robustum	Yes	No	No	No

As nouns, scouring rush and Equisetum robustum are synonyms defined as:

scouring rush and Equisetum robustum: evergreen erect horsetail with rough-edged stems; formerly used for scouring utensils

Other synonyms of scouring rush include Equisetum hyemale, Equisetum hyemale robustum, rough horsetail.

scouring rush (noun)	Equisetum robustum (noun)
evergreen erect horsetail with rough-edged stems; formerly used for scouring utensils	evergreen erect horsetail with rough-edged stems; formerly used for scouring utensils