pummelo vs shaddock

pummelo and shaddock both are nouns.

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

As nouns, pummelo and shaddock are synonyms defined as:

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

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

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