Owl And Dog Friends

• Acquaintance: not a true friend—sharing of emotional ties are absent. An example would be a coworker with whom you enjoy eating lunch or having coffee, but would not look to for emotional support. Many "friends" that appear on social networking sites are generally acquaintances in real life.
• Best friend (or the closest friend): A person with whom someone shares extremely strong interpersonal ties with as a friend.
• BFF ("best friend forever"): Slang used primarily in the USA by teenage and young adult women to describe a girl friend or close best friend.
• Blood brother or blood sister: Either people related by birth, or a circle of friends who swear loyalty by mingling the blood of each member together though not recommended for risk of blood disease.