syn·chro·nize \ˈsiŋ-krə-ˌnīz, ˈsin-\
: to happen at the same time
1 : to represent or arrange (events) to indicate coincidence or coexistence
2 : to make synchronous in operation
3 : to make (motion-picture sound) exactly simultaneous with the action
—Merriam-Webster Online Dictionary
The Barkleys of Broadway. Dir. Charles Walters. Pro. Arthur Freed. Perf. Fred Astaire, Ginger Rogers, Oscar Levant. MGM, 1949.