pomelo tree vs Citrus decumana

pomelo tree and Citrus decumana both are nouns.

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

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

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

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

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