Citrus decumana vs pomelo tree

Citrus decumana and pomelo tree both are nouns.

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

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

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

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

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