rocket cress vs weed

rocket cress and weed both are nouns.

Word	Noun	Adjective	Verb	Adverb
rocket cress	Yes	No	No	No
weed	Yes	No	Yes	No

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

rocket cress: noxious cress with yellow flowers; sometimes placed in genus Sisymbrium
weed: any plant that crowds out cultivated plants

rocket cress (noun)	weed (noun)
noxious cress with yellow flowers; sometimes placed in genus Sisymbrium	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

rocket cress (verb)	weed (verb)
	clear of weeds