Citrus maxima vs pomelo tree

Citrus maxima and pomelo tree both are nouns.

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

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

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

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

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