annihilation

In physics terms the difference between annihilation and coannihilation

is that annihilation is the process of a particle and its corresponding antiparticle combining to produce energy while coannihilation is the mutual annihilation of a pair of colliding particles.

As nouns the difference between annihilation and coannihilation

is that annihilation is the act of reducing to nothing, or nonexistence; or the act of destroying the form or combination of parts under which a thing exists, so that the name can no longer be applied to it; as, the annihilation of a corporation while coannihilation is the mutual annihilation of a pair of colliding particles.

As nouns the difference between annihilation and bumwhush

is that annihilation is annihilation while bumwhush is obscurity, ruin, annihilation.