butterflower vs goldcup

butterflower and goldcup both are nouns.

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

As nouns, butterflower and goldcup are synonyms defined as:

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

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