Citrus maxima vs Citrus decumana

Citrus maxima and Citrus decumana both are nouns.

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

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

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

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

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