coincidence >> /koʊˈɪnsədəns/
Definition: [noun] A remarkable concurrence of events or circumstances without apparent causal connection.
Example: they met by coincidence
Definition: [noun] Correspondence in nature or in time of occurrence.
Example: the coincidence of interest between the mining companies and certain politicians
Definition: [noun] The presence of ionizing particles or other objects in two or more detectors simultaneously, or of two or more signals simultaneously in a circuit.
Example: In their estimation, nothing could explain the coincidences except the momentary passing of a gravitational wave.