silverweed vs vine

silverweed and vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
silverweed	Yes	No	No	No
vine	Yes	No	No	No

As nouns, vine is a hypernym of silverweed; that is, vine is a word with a broader meaning than silverweed:

silverweed: any of various twining shrubs of the genus Argyreia having silvery leaves and showy purple flowers
vine: a plant with a weak stem that derives support from climbing, twining, or creeping along a surface

silverweed (noun)	vine (noun)
any of various twining shrubs of the genus Argyreia having silvery leaves and showy purple flowers	a plant with a weak stem that derives support from climbing, twining, or creeping along a surface
low-growing perennial having leaves silvery beneath; northern United States, Europe, Asia