annihilation
1. [ noun ] destruction by annihilating something
Synonyms: obliteration
Related terms: destruction vaporization atomization pulverization obliterate
2. [ noun ] total destruction
Synonyms: disintegration
Examples:

"bomb tests resulted in the annihilation of the atoll"

Related terms: destruction extinction eliminate
Similar spelling:   annihilating
  annihilative
  annihilate
  annihilator
  annihilated