king devil vs weed

king devil and weed both are nouns.

Word	Noun	Adjective	Verb	Adverb
king devil	Yes	No	No	No
weed	Yes	No	Yes	No

As nouns, weed is a hypernym of king devil; that is, weed is a word with a broader meaning than king devil:

king devil: European hawkweed introduced into northeastern United States; locally troublesome weeds
weed: any plant that crowds out cultivated plants

king devil (noun)	weed (noun)
European hawkweed introduced into northeastern United States; locally troublesome weeds	street names for marijuana
	a black band worn by a man (on the arm or hat) as a sign of mourning
	any plant that crowds out cultivated plants

king devil (verb)	weed (verb)
	clear of weeds