giant buttercup vs Laccopetalum giganteum

giant buttercup and Laccopetalum giganteum both are nouns.

Word	Noun	Adjective	Verb	Adverb
giant buttercup	Yes	No	No	No
Laccopetalum giganteum	Yes	No	No	No

As nouns, giant buttercup and Laccopetalum giganteum are synonyms defined as:

giant buttercup and Laccopetalum giganteum: spectacular perennial native of wet montane grasslands of Peru; formerly included in genus Ranunculus

giant buttercup (noun)	Laccopetalum giganteum (noun)
spectacular perennial native of wet montane grasslands of Peru; formerly included in genus Ranunculus	spectacular perennial native of wet montane grasslands of Peru; formerly included in genus Ranunculus