dimwit vs doofus

dimwit and doofus both are nouns.

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

As nouns, dimwit and doofus are synonyms defined as:

Other synonyms of dimwit include half-wit, nitwit.

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