noun (n)

• the state of freedom from fear or danger(noun.state)

  Antonym:
  insecureness
  

  source: wordnet30
• the quality of being fixed in place as by some firm attachment(noun.attribute)

  Synonym:
  fastness, fixedness, fixity, fixture
  Antonym:
  looseness
  

  source: wordnet30
• The condition or quality of being secure; exemption from fear; want of vigilance; security.(noun)

  source: webster1913