pomelo vs Citrus decumana

pomelo and Citrus decumana both are nouns.

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

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

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

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

pomelo (noun)	Citrus decumana (noun)
large pear-shaped fruit similar to grapefruit but with coarse dry pulp	southeastern Asian tree producing large fruits resembling grapefruits
southeastern Asian tree producing large fruits resembling grapefruits