You can use animation clips with other objects if you reassign the objects used in them.

To reuse an animation track:

1. In the Story window, right-click an empty Action track and select Insert Generic Animation track from the contextual menu.

   A new Animation track is added.

2. Right-click the new track and select Insert Animation file from the contextual menu.

   Select the animation clip you want to use from the Open File dialog box. The animation clip is added to the track.

3. Rename the object you want to use the animation clip so it has the same name as the object that used the original animation.
4. In the Track Content asset list, assign a new object as the object to be used by the Animation clip.