sweetpea vs vine

sweetpea and vine both are nouns.

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

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

sweetpea: 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

sweetpea (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