Barbarea vulgaris vs weed

Barbarea vulgaris and weed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Barbarea vulgaris	Yes	No	No	No
weed	Yes	No	Yes	No

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

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

Barbarea vulgaris (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

Barbarea vulgaris (verb)	weed (verb)
	clear of weeds