frost-weed vs Verbesina virginica

frost-weed and Verbesina virginica both are nouns.

Word	Noun	Adjective	Verb	Adverb
frost-weed	Yes	No	No	No
Verbesina virginica	Yes	No	No	No

As nouns, frost-weed and Verbesina virginica are synonyms defined as:

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

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

frost-weed (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