What is a synonym for surge?

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

General increase:

* Rise

* Increase

* Growth

* Upsurge

* Spurt

* Upswing

* Climb

* Jump

* Spike

Sudden increase:

* Burst

* Rush

* Flood

* Wave

* Outburst

Movement:

* Rush

* Flow

* Wave

* Swell

Emotion:

* Outburst

* Eruption

* Flare-up

The best synonym for "surge" will depend on the specific context in which you are using it.