When you need an alternative to "teams up with," there are plenty of words you can use to describe partnerships or collaborations. For example, you could say that two groups or people joined forces, paired up, allied, or combined efforts. Alternatively, you might describe a merger, a collaboration, or a coalition. These words can be useful when talking about business or politics, but they can also be helpful when discussing creative endeavors or personal relationships. No matter what situation you're in, there are always different ways to describe the process of working together and achieving common goals.