pomelo tree vs Citrus grandis

pomelo tree and Citrus grandis both are nouns.

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

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

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

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

pomelo tree (noun)	Citrus grandis (noun)
southeastern Asian tree producing large fruits resembling grapefruits	southeastern Asian tree producing large fruits resembling grapefruits