dimwit vs nitwit

dimwit and nitwit both are nouns.

Word	Noun	Adjective	Verb	Adverb
dimwit	Yes	No	No	No
nitwit	Yes	No	No	No

As nouns, dimwit and nitwit are synonyms defined as:

Other synonyms of dimwit include doofus, half-wit.

dimwit (noun)	nitwit (noun)
a stupid incompetent person	a stupid incompetent person