When trying to express familiarity with a person, place or thing, the phrase "am acquainted with" can sometimes feel a bit formal or stilted. Luckily, there are a number of synonyms you can use to convey the same message in a more natural way. For example, you might say you are familiar with something or someone, or that you have knowledge of them. You could also say you know something or someone well, or that you are acquainted or familiarized with them. Other options include being conversant with, versed in, or experienced with something or someone. Ultimately, the synonym you choose will depend on the tone of the conversation you are having, as well as your own personal style and preferences.