synchronization

(noun) the relation that exists when things occur at the same time. Synonyms: synchronism, synchrony, synchronicity, synchroneity, synchronisation, synchronizing. Example: "The drug produces an increased synchrony of the brain waves."

(noun) an adjustment that causes something to occur or recur in unison. Synonyms: synchronisation, synchronizing, synchronising.

(noun) coordinating by causing to indicate the same time. Synonyms: synchronisation, synchronizing. Example: "The synchronization of their watches was an important preliminary."