As nouns the difference between happenchance and coincidence
is that happenchance
is a coincidental occurrence while coincidence
A coincidental occurrence.
Of objects, the property of being coincident; occurring at the same time or place.
Of events, the appearance of a meaningful connection when there is none.
(analysis) A coincidence point.
A fixed point of a correspondence; a point of a variety corresponding to itself under a correspondence.
* (in analysis) coincidence point
* coincidence point
* coincidence theory
* index of coincidence
* Lefschetz coincidence theorem