synchronism

/ˈsɪŋkrəˌnɪzəm/
noun
  1. The state or condition of happening at the same time or moving at the same rate.
    • Historians noted the synchronism of the two revolutions in different countries.
    • The synchronism of the dancers' movements made the performance look flawless.
    • The film's soundtrack was carefully edited to achieve perfect synchronism with the action on screen.
Antonyms