goldfields vs wild flower

goldfields and wild flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
goldfields	Yes	No	No	No
wild flower	Yes	No	No	No

As nouns, wild flower is a hypernym of goldfields; that is, wild flower is a word with a broader meaning than goldfields:

goldfields: small slender woolly annual with very narrow opposite leaves and branches bearing solitary golden-yellow flower heads; southwestern Oregon to Baja California and Arizona; often cultivated
wild flower: wild or uncultivated flowering plant

Other hypernyms of goldfields include wildflower.

goldfields (noun)	wild flower (noun)
small slender woolly annual with very narrow opposite leaves and branches bearing solitary golden-yellow flower heads; southwestern Oregon to Baja California and Arizona; often cultivated	wild or uncultivated flowering plant