ETYM Cf. French coďncidence.
1. An event that might have been arranged although it was really accidental; SYN. happenstance.
2. The quality of occupying the same position or area in space.

ETYM Cf. French contingence.
The state of being contingent on something.

ETYM Cf. French éventualité.
A possible event or occurrence or result; SYN. contingency.

The quality of happening accidentally and by lucky chance.

Randomness, irregularity; lack of organization, carelessness

The quality of lacking any predictable order or plan; SYN. haphazardness.