obliteration
ob·li·te·ration
noun
1.
destruction by annihilating something
2.
the complete destruction of every trace of something
Origin
From obliterate + -ion.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.