Somebody's alternate personality or persona; another self.
A very close and intimate friend.
A corporation used by a person to conduct personal business in an attempt to shield himself or herself from personal liability, and which a court may penetrate by "piercing the corporate veil" to impose liability on the person when they commit fraud or injustice.
One who or that which resembles another.
Either of two parts that fit together, or complement one another.
A duplicate of a legal document.
One who or that which has corresponding functions or characteristics.
Either half of a flattened fossil when the rock has split along the plane of the fossil.
To counterbalance.