common buttercup vs Ranunculus bulbosus

common buttercup and Ranunculus bulbosus both are nouns.

Word	Noun	Adjective	Verb	Adverb
common buttercup	Yes	No	No	No
Ranunculus bulbosus	Yes	No	No	No

As nouns, common buttercup and Ranunculus bulbosus are synonyms defined as:

common buttercup and Ranunculus bulbosus: perennial Old World buttercup with golden to sulphur yellow flowers in late spring to early summer; naturalized in North America

common buttercup (noun)	Ranunculus bulbosus (noun)
perennial Old World buttercup with golden to sulphur yellow flowers in late spring to early summer; naturalized in North America	perennial Old World buttercup with golden to sulphur yellow flowers in late spring to early summer; naturalized in North America