Scleranthus annuus vs weed

Scleranthus annuus and weed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scleranthus annuus	Yes	No	No	No
weed	Yes	No	Yes	No

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

Scleranthus annuus: widely distributed low-growing Eurasian herb having narrow leaves and inconspicuous green flowers
weed: any plant that crowds out cultivated plants

Scleranthus annuus (noun)	weed (noun)
widely distributed low-growing Eurasian herb having narrow leaves and inconspicuous green 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

Scleranthus annuus (verb)	weed (verb)
	clear of weeds