self-confidence vs self-assurance

self-confidence and self-assurance both are nouns.

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

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

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

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

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