pomelo vs Citrus grandis

pomelo and Citrus grandis both are nouns.

Word	Noun	Adjective	Verb	Adverb
pomelo	Yes	No	No	No
Citrus grandis	Yes	No	No	No

As nouns, pomelo and Citrus grandis are synonyms defined as:

pomelo and Citrus grandis: southeastern Asian tree producing large fruits resembling grapefruits

Other synonyms of pomelo include Citrus decumana, Citrus maxima, pomelo tree, pummelo, shaddock.

pomelo (noun)	Citrus grandis (noun)
large pear-shaped fruit similar to grapefruit but with coarse dry pulp	southeastern Asian tree producing large fruits resembling grapefruits
southeastern Asian tree producing large fruits resembling grapefruits