climbing bittersweet vs vine

climbing bittersweet and vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
climbing bittersweet	Yes	No	No	No
vine	Yes	No	No	No

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

climbing bittersweet: twining shrub of North America having yellow capsules enclosing scarlet seeds
vine: a plant with a weak stem that derives support from climbing, twining, or creeping along a surface

climbing bittersweet (noun)	vine (noun)
twining shrub of North America having yellow capsules enclosing scarlet seeds	a plant with a weak stem that derives support from climbing, twining, or creeping along a surface