frostweed vs Verbesina virginica

frostweed and Verbesina virginica both are nouns.

Word	Noun	Adjective	Verb	Adverb
frostweed	Yes	No	No	No
Verbesina virginica	Yes	No	No	No

As nouns, frostweed and Verbesina virginica are synonyms defined as:

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

Other synonyms of frostweed include frost-weed, Virginia crownbeard.

frostweed (noun)	Verbesina virginica (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