goldcup vs buttercup

goldcup and buttercup both are nouns.

Word	Noun	Adjective	Verb	Adverb
goldcup	Yes	No	No	No
buttercup	Yes	No	No	No

As nouns, goldcup and buttercup are synonyms defined as:

Other synonyms of goldcup include butter-flower, butterflower, crowfoot, kingcup.

goldcup (noun)	buttercup (noun)
any of various plants of the genus Ranunculus	any of various plants of the genus Ranunculus