king devil vs Hieracium praealtum

king devil and Hieracium praealtum both are nouns.

Word	Noun	Adjective	Verb	Adverb
king devil	Yes	No	No	No
Hieracium praealtum	Yes	No	No	No

As nouns, king devil and Hieracium praealtum are synonyms defined as:

king devil and Hieracium praealtum: European hawkweed introduced into northeastern United States; locally troublesome weeds

Other synonyms of king devil include yellow hawkweed.

king devil (noun)	Hieracium praealtum (noun)
European hawkweed introduced into northeastern United States; locally troublesome weeds	European hawkweed introduced into northeastern United States; locally troublesome weeds