frostweed vs Virginia crownbeard

frostweed and Virginia crownbeard both are nouns.

Word	Noun	Adjective	Verb	Adverb
frostweed	Yes	No	No	No
Virginia crownbeard	Yes	No	No	No

As nouns, frostweed and Virginia crownbeard are synonyms defined as:

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

Other synonyms of frostweed include frost-weed, Verbesina virginica.

frostweed (noun)	Virginia crownbeard (noun)
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
tall perennial herb having clusters of white flowers; the eastern United States