Senecio vulgaris vs weed

Senecio vulgaris and weed both are nouns.

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

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

Senecio vulgaris (noun)	weed (noun)
Eurasian weed with heads of small yellow flowers	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

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