Virginia crownbeard vs frost-weed

Virginia crownbeard and frost-weed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Virginia crownbeard	Yes	No	No	No
frost-weed	Yes	No	No	No

As nouns, Virginia crownbeard and frost-weed are synonyms defined as:

Virginia crownbeard and frost-weed: tall perennial herb having clusters of white flowers; the eastern United States

Other synonyms of Virginia crownbeard include frostweed, Verbesina virginica.

Virginia crownbeard (noun)	frost-weed (noun)
tall perennial herb having clusters of white flowers; the eastern United States	perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts
	tall perennial herb having clusters of white flowers; the eastern United States