elephant's-foot vs vine

elephant's-foot and vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
elephant's-foot	Yes	No	No	No
vine	Yes	No	No	No

As nouns, vine is a hypernym of elephant's-foot; that is, vine is a word with a broader meaning than elephant's-foot:

elephant's-foot: South African vine having a massive rootstock covered with deeply fissured bark
vine: a plant with a weak stem that derives support from climbing, twining, or creeping along a surface

elephant's-foot (noun)	vine (noun)
any plant of the genus Elephantopus having heads of blue or purple flowers; America	a plant with a weak stem that derives support from climbing, twining, or creeping along a surface
South African vine having a massive rootstock covered with deeply fissured bark