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Noun: hostilities  hós'ti-lu-teez
  1. Fighting; acts of overt warfare
    "the outbreak of hostilities";
    - belligerency
Noun: hostility  hós'ti-lu-tee
  1. A hostile (very unfriendly) disposition
    "he could not conceal his hostility";
    - ill will
  2. A state of deep-seated ill-will
    - enmity, antagonism
  3. The feeling of a hostile person
    "he could no longer contain his hostility";
    - enmity, ill will
  4. Violent action that is hostile and usually unprovoked
    - aggression

Type of: action, armed combat, combat, hate, hatred, state, unfriendliness

Encyclopedia: Hostilities