idiot vs changeling

idiot and changeling both are nouns.

Word	Noun	Adjective	Verb	Adverb
idiot	Yes	No	No	No
changeling	Yes	No	No	No

As nouns, idiot and changeling are synonyms defined as:

Other synonyms of idiot include cretin, half-wit, imbecile, moron, retard.

idiot (noun)	changeling (noun)
a person of subnormal intelligence	a child secretly exchanged for another in infancy
	a person of subnormal intelligence