Cobber is an Australian slang term for a mate or friend. There are several synonyms for cobber, including mate, buddy, pal, chum, colleague, companion, confidant, comrade, partner, and ally. These words have all been used to describe someone who is a close friend, or someone who has a special bond with another person. Whether it's a friend you've known for years, a colleague you work with closely or an ally in a particular situation, having a cobber is an important part of life. These synonyms for cobber all highlight the importance of friendship and camaraderie in our lives.