Answer: coincidence

AnswerCrossword Clue
COINCIDENCE"Believe It or Not!" item, often
coincidenceCorrespondence in nature or in time of occurrence
coincidenceThe presence of ionizing particles or other objects in two or more detectors simultaneously, or of two or more signals simultaneously in a circuit
coincidenceA remarkable concurrence of events or circumstances without apparent causal connection
coincidencethe act or condition of coinciding also COINCIDENCY