To move or swing back and forth in a regular rhythm.

झूलना

English Usage: The fan was oscillating to cool the entire room.

Hindi Usage: पंखा पूरे कमरे को ठंडा करने के लिए झूल रहा था।

The act or process of oscillating; a repeated fluctuation.

दोलन

English Usage: The oscillation of the pendulum was measured in seconds.

Hindi Usage: झूलते हुए झूले का दोलन सेकंड में मापा गया।