idiot vs half-wit

idiot and half-wit both are nouns.

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

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

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

idiot (noun)	half-wit (noun)
a person of subnormal intelligence	a stupid incompetent person
	a person of subnormal intelligence