red gram vs shrub

red gram and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
red gram	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of red gram; that is, shrub is a word with a broader meaning than red gram:

red gram: tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of red gram include bush.

red gram (noun)	shrub (noun)
tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics	a low woody perennial plant usually having several major stems