unison

the flutes play in unison with the violas.

They ran together, their legs moving in unison.

The governments acted in unison to combat terrorism.

good unisons are formed by flutes, oboes, and clarinets.

aquacade: AN entertainment spectacle of swimmers ANd divers, often performing in unison to the accompANiment of music.

I am pleased to report that the various committees are now working in unison to thoroughly investigate this matter.