Fraternizes is a term that generally refers to socializing and forming friendly relationships with people. However, there are many synonyms for this word that can help you express this concept in different ways. Some similar terms include hobnobbing, mingling, associating, consorting, fellowshipping, consociating, and befriending. These words all convey the idea of interacting with others in a social setting and establishing positive connections. Each synonym has its own unique connotations, however, so choosing the right one will depend on the specific context and tone you're going for.