Self-confidence, n.
The quality or state of being self-confident; self-reliance. A feeling of self-confidence which supported and sustained him. Beaconsfield.
Shades of meaning
Fernald has no entry of its own for self-confidence; he lists it under assurance, egotism.
Where he writes about it:
For the calm conviction of one's own rectitude and ability, self-confidence is a better word than assurance; self-reliance expresses confidence in one's own resources, independently of others' aid. — from assurance
There is a worthy self-confidence which springs from consciousness of rectitude and of power equal to demands. — from egotism
Self-esteem is more solid and better founded than self-conceit; but is ordinarily a weakness, and never has the worthy sense of self-confidence. — from egotism