nitwit vs dimwit

nitwit and dimwit both are nouns.

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

As nouns, nitwit and dimwit are synonyms defined as:

Other synonyms of nitwit include doofus, half-wit.

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