yellow hawkweed vs king devil

yellow hawkweed and king devil both are nouns.

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

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

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

Other synonyms of yellow hawkweed include Hieracium praealtum.

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