king devil vs yellow hawkweed

king devil and yellow hawkweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
king devil	Yes	No	No	No
yellow hawkweed	Yes	No	No	No

As nouns, king devil and yellow hawkweed are synonyms defined as:

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

Other synonyms of king devil include Hieracium praealtum.

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