prodigy vs portent

prodigy and portent both are nouns.

Word	Noun	Adjective	Verb	Adverb
prodigy	Yes	No	No	No
portent	Yes	No	No	No

As nouns, prodigy and portent are synonyms defined as:

Other synonyms of prodigy include omen, presage, prognostic, prognostication.

prodigy (noun)	portent (noun)
an impressive or wonderful example of a particular quality	a sign of something about to happen
a sign of something about to happen
an unusually gifted or intelligent (young) person; someone whose talents excite wonder and admiration