self-assurance vs self-confidence

self-assurance and self-confidence both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-assurance	Yes	No	No	No
self-confidence	Yes	No	No	No

As nouns, self-assurance and self-confidence are synonyms defined as:

self-assurance and self-confidence: freedom from doubt; belief in yourself and your abilities

Other synonyms of self-assurance include assurance, authority, confidence, sureness.

self-assurance (noun)	self-confidence (noun)
freedom from doubt; belief in yourself and your abilities	freedom from doubt; belief in yourself and your abilities