changeling vs half-wit

changeling and half-wit both are nouns.

Word	Noun	Adjective	Verb	Adverb
changeling	Yes	No	No	No
half-wit	Yes	No	No	No

As nouns, changeling and half-wit are synonyms defined as:

Other synonyms of changeling include cretin, idiot, imbecile, moron, retard.

changeling (noun)	half-wit (noun)
a child secretly exchanged for another in infancy	a stupid incompetent person
a person of subnormal intelligence	a person of subnormal intelligence