pigeon-pea plant vs Cajanus cajan

pigeon-pea plant and Cajanus cajan both are nouns.

Word	Noun	Adjective	Verb	Adverb
pigeon-pea plant	Yes	No	No	No
Cajanus cajan	Yes	No	No	No

As nouns, pigeon-pea plant and Cajanus cajan are synonyms defined as:

pigeon-pea plant and Cajanus cajan: tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics

Other synonyms of pigeon-pea plant include cajan pea, catjang pea, dahl, dhal, pigeon pea, red gram.

pigeon-pea plant (noun)	Cajanus cajan (noun)
tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics	tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics