shaddock vs pomelo tree

shaddock and pomelo tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
shaddock	Yes	No	No	No
pomelo tree	Yes	No	No	No

As nouns, shaddock and pomelo tree are synonyms defined as:

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

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

shaddock (noun)	pomelo tree (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