Citrus grandis vs pummelo

Citrus grandis and pummelo both are nouns.

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

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

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

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

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