changeling vs cretin

changeling and cretin both are nouns.

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

As nouns, changeling and cretin are synonyms defined as:

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

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