tall field buttercup vs Ranunculus acris

tall field buttercup and Ranunculus acris both are nouns.

Word	Noun	Adjective	Verb	Adverb
tall field buttercup	Yes	No	No	No
Ranunculus acris	Yes	No	No	No

As nouns, tall field buttercup and Ranunculus acris are synonyms defined as:

tall field buttercup and Ranunculus acris: perennial European buttercup with yellow spring flowers widely naturalized especially in eastern North America

Other synonyms of tall field buttercup include meadow buttercup, tall buttercup, tall crowfoot.

tall field buttercup (noun)	Ranunculus acris (noun)
perennial European buttercup with yellow spring flowers widely naturalized especially in eastern North America	perennial European buttercup with yellow spring flowers widely naturalized especially in eastern North America