concurrence

(noun) agreement of results or opinions. Synonyms: concurrency.

(noun) acting together, as agents or circumstances or events. Synonyms: concurrency.

(noun) a state of cooperation. Synonyms: meeting of minds.

(noun) the temporal property of two things happening at the same time. Synonyms: coincidence, conjunction, co-occurrence. Example: "The interval determining the coincidence gate is adjustable."