pomelo vs pummelo

pomelo and pummelo both are nouns.

Word	Noun	Adjective	Verb	Adverb
pomelo	Yes	No	No	No
pummelo	Yes	No	No	No

As nouns, pomelo and pummelo are synonyms defined as:

pomelo and pummelo: southeastern Asian tree producing large fruits resembling grapefruits

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

pomelo (noun)	pummelo (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