wild yam vs vine

wild yam and vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild yam	Yes	No	No	No
vine	Yes	No	No	No

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

wild yam: having a rhizome formerly dried and used to treat rheumatism or liver disorders
vine: a plant with a weak stem that derives support from climbing, twining, or creeping along a surface

wild yam (noun)	vine (noun)
having a rhizome formerly dried and used to treat rheumatism or liver disorders	a plant with a weak stem that derives support from climbing, twining, or creeping along a surface