sweet pea vs vine

sweet pea and vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet pea	Yes	No	No	No
vine	Yes	No	No	No

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

sweet pea: climbing garden plant having fragrant pastel-colored flowers
vine: a plant with a weak stem that derives support from climbing, twining, or creeping along a surface

sweet pea (noun)	vine (noun)
climbing garden plant having fragrant pastel-colored flowers	a plant with a weak stem that derives support from climbing, twining, or creeping along a surface