horse grain vs Macrotyloma uniflorum

horse grain and Macrotyloma uniflorum both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse grain	Yes	No	No	No
Macrotyloma uniflorum	Yes	No	No	No

As nouns, horse grain and Macrotyloma uniflorum are synonyms defined as:

horse grain and Macrotyloma uniflorum: twining herb of Old World tropics cultivated in India for food and fodder; sometimes placed in genus Dolichos

Other synonyms of horse grain include Dolichos biflorus, horse gram, poor man's pulse.

horse grain (noun)	Macrotyloma uniflorum (noun)
twining herb of Old World tropics cultivated in India for food and fodder; sometimes placed in genus Dolichos	twining herb of Old World tropics cultivated in India for food and fodder; sometimes placed in genus Dolichos