self-confidence vs assurance

self-confidence and assurance both are nouns.

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

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

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

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

self-confidence (noun)	assurance (noun)
freedom from doubt; belief in yourself and your abilities	freedom from doubt; belief in yourself and your abilities
	a statement intended to inspire confidence
	a binding commitment to do or give or refrain from something
	a British term for some kinds of insurance