Source : Webster's Revised Unabridged Dictionary (1913)

Synchronize \Syn"chro*nize\, v. i. [imp. & p. p. {Synchronized};
   p. pr. & vb. n. {Synchronizing}.] [Gr. ?.]
   To agree in time; to be simultaneous.

         The path of this great empire, through its arch of
         progress, synchronized with that of Christianity. --De
                                                  Quincey.

Source : WordNet®

synchronizing
     n 1: the relation that exists when things occur at the same time;
          "the drug produces an increased synchrony of the brain
          waves" [syn: {synchronism}, {synchrony}, {synchronicity},
           {synchroneity}, {synchronization}, {synchronisation}]
          [ant: {asynchronism}, {asynchronism}, {asynchronism}]
     2: an adjustment that causes something to occur or recur in
        unison [syn: {synchronization}, {synchronisation}, {synchronising}]
     3: coordinating by causing to indicate the same time; "the
        synchronization of their watches was an important
        preliminary" [syn: {synchronization}, {synchronisation}]