golden ironweed vs crown-beard

golden ironweed and crown-beard both are nouns.

Word	Noun	Adjective	Verb	Adverb
golden ironweed	Yes	No	No	No
crown-beard	Yes	No	No	No

As nouns, crown-beard is a hypernym of golden ironweed; that is, crown-beard is a word with a broader meaning than golden ironweed:

golden ironweed: perennial herb with showy yellow flowers; the eastern United States
crown-beard: any plant of the genus Verbesina having clustered white or yellow flower heads

Other hypernyms of golden ironweed include crown beard, crownbeard.

golden ironweed (noun)	crown-beard (noun)
perennial herb with showy yellow flowers; the eastern United States	any plant of the genus Verbesina having clustered white or yellow flower heads