overconfidence vs certitude

overconfidence and certitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
overconfidence	Yes	No	No	No
certitude	Yes	No	No	No

As nouns, overconfidence and certitude are synonyms defined as:

overconfidence and certitude: total certainty or greater certainty than circumstances warrant

Other synonyms of overconfidence include cocksureness.

overconfidence (noun)	certitude (noun)
total certainty or greater certainty than circumstances warrant	total certainty or greater certainty than circumstances warrant