pomelo tree vs Citrus maxima

pomelo tree and Citrus maxima both are nouns.

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

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

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

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

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