Teaming up is a popular way to work collaboratively with someone else. There are many synonyms for the phrase, including joined forces, banded together, partnered up, allied, united, and shared resources. These phrases all convey the concept of working together in a cooperative and supportive manner towards a common goal. They can be used in a variety of contexts, from sports teams to business partnerships. Whatever the situation, using synonyms for "teamed up" can enhance communication and convey a sense of unity and purpose.