What is another word for back and forth?

Here are some synonyms for "back and forth", depending on the context:

For movement:

* Reciprocating

* Alternating

* Oscillating

* Revolving

* Swinging

* To and fro

* Side to side

* Up and down

For conversation or argument:

* Dialogue

* Debate

* Discussion

* Exchanging

* Bargaining

* Negotiating

* Rebuttal

For a repeated action:

* Iterative

* Repetitive

* Cyclical

For a change in direction:

* Reversibility

* Reversal

* Shifting

* Turning

* Flipping

The best synonym depends on the specific context of the sentence.