sweetpea vs Lathyrus odoratus

sweetpea and Lathyrus odoratus both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweetpea	Yes	No	No	No
Lathyrus odoratus	Yes	No	No	No

As nouns, sweetpea and Lathyrus odoratus are synonyms defined as:

sweetpea and Lathyrus odoratus: climbing garden plant having fragrant pastel-colored flowers

Other synonyms of sweetpea include sweet pea.

sweetpea (noun)	Lathyrus odoratus (noun)
climbing garden plant having fragrant pastel-colored flowers	climbing garden plant having fragrant pastel-colored flowers