Here are some other terms that might be used:
* Rebuttal: A direct response to an argument, often aimed at refuting or weakening it.
* Counter-thesis: A statement that contradicts or challenges the main thesis of an argument.
* Alternative perspective: A different way of looking at the issue, often based on different assumptions or values.
* Opposition: A general term for those who disagree with a particular argument.
It's important to note that the specific term used can vary depending on the context. However, all of these terms refer to the opposing side of an argument.