The Collaborative International Dictionary of English v.0.48:
Annihilationist \An*ni`hi*la"tion*ist\, n. (Theol.)
One who believes that eternal punishment consists in
annihilation or extinction of being; a destructionist.
[1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Destructionist \De*struc"tion*ist\, n.
1. One who delights in destroying that which is valuable; one
whose principles and influence tend to destroy existing
institutions; a destructive.
[1913 Webster]
2. (Theol.) One who believes in the final destruction or
complete annihilation of the wicked; -- called also
annihilationist. --Shipley.
[1913 Webster]