connection(A link via wire, radio, fiber-optic cable, or other medium between two or more communications devices); relationship(An association established between common fields (columns) in two tables. A relationship can be one-to-one, many-to-many, or one-to-many)
Relationship(A SmartArt graphic layout type that includes layouts designed to illustrate connections); Online(An item on the user's My Status menu. This is a status the user can select while signed in, to make it appear to other users that he is currently online)