pummelo vs Citrus maxima

pummelo and Citrus maxima both are nouns.

Word	Noun	Adjective	Verb	Adverb
pummelo	Yes	No	No	No
Citrus maxima	Yes	No	No	No

As nouns, pummelo and Citrus maxima are synonyms defined as:

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

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

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