pummelo vs Citrus grandis

pummelo and Citrus grandis both are nouns.

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

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

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

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

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