pigeon pea vs red gram

pigeon pea and red gram both are nouns.

Word	Noun	Adjective	Verb	Adverb
pigeon pea	Yes	No	No	No
red gram	Yes	No	No	No

As nouns, pigeon pea and red gram are synonyms defined as:

pigeon pea and red gram: tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics

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

pigeon pea (noun)	red gram (noun)
small highly nutritious seed of the tropical pigeon-pea plant	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