cretin vs changeling

cretin and changeling both are nouns.

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

As nouns, cretin and changeling are synonyms defined as:

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

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