tall buttercup vs meadow buttercup

tall buttercup and meadow buttercup both are nouns.

Word	Noun	Adjective	Verb	Adverb
tall buttercup	Yes	No	No	No
meadow buttercup	Yes	No	No	No

As nouns, tall buttercup and meadow buttercup are synonyms defined as:

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

Other synonyms of tall buttercup include Ranunculus acris, tall crowfoot, tall field buttercup.

tall buttercup (noun)	meadow buttercup (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