What is a synonym for wave?

Here are some synonyms for "wave," depending on the context:

General:

* Undulation

* Ripple

* Swell

* Surge

* Billow

* Crest

* Trough

* Motion

* Fluctuation

Specifically for water:

* Breaker

* Current

* Tide

* Surf

Specifically for hand gestures:

* Signal

* Greeting

* Beckon

* Salute

Figuratively:

* Flow

* Rush

* Surge

* Trend

* Movement

In physics:

* Oscillation

* Vibration

* Propagation

The best synonym will depend on the specific meaning you want to convey.