1) Replacement 2) Replacing 3) Supersession 1) Supersession 
• (n.) The act of superseding, or setting aside; supersession; as, the supersedure of trial by jury.
the natural replacement of an established queen by a newly reared queen in the same hive.
a natural replacement of an established queen by a daughter in the same hive. Shortly after the young queen commences to lay eggs, the old queen disappears.
a natural replacement of an established queen by a daughter in the same hive. Shortly after the young queen commences to lay eggs, the old queen disappears.
The natural replacement of one queen by another while first is still alive (without swarming).
Su·per·se'dure noun The act of superseding, or setting aside; supersession; as, the supersedure of trial by jury. A. Hamilton. 
[n] - act of replacing one person or thing by another especially one held to be superior
supersession noun act of replacing one person or thing by another especially one held to be superior
supersession.