A sister is a sibling, a woman of a religious order, or a woman of an organization. A friend is someone with whom you can connect on a pleasant level and share details about your relationship dynamics. These two relationships have many things in common. Both are important parts of any person's life. At its most basic, a sister or friend is someone with whom you share your experience and knowledge. They might also provide support when you need it. There are differences between these relationships though. While sisters tend to be siblings of a same parent, friends can be siblings or not. Also, a sister will always be your sibling, but with friends this is not always the case. Finally, a sister would never call another sister her friend, while this is acceptable between friends. People often confuse friends with relatives. This is wrong because they are not the same at all. A friend is someone who helps you deal with your problems and concerns as well as provides emotional support. A relative is someone who is part of your family tree or lineage. They could also be someone who is like a brother or sister to you. In fact, within our culture there are many similarities between these relationships; however, they still differ in many ways.