When forming bonds with others, it's common to use phrases like "chum up with" in conversations. However, sometimes using the same phrase repeatedly can make your language feel bland or repetitive. To avoid this, it's helpful to know a few synonyms for the term "chum up with" that you can mix into your vocabulary. Some possibilities include: "befriend", "buddy up with", "bond with", "make friends with", "hang out with", "pal around with", "team up with" and "ally with". Using these words can help you express the same sentiment in a fresh and interesting way, while also making your conversations more engaging and varied.