noun (n)

• faithful support for a cause or political party or religion(noun.act)

  Example:
  Adherence to a fat-free diet.
  

  Synonym:
  adhesion, attachment
  

  source: wordnet30
• the property of sticking together (as of glue and wood) or the joining of surfaces of different composition(noun.attribute)

  Synonym:
  adhesion, adhesiveness, bond
  

  source: wordnet30
• The quality or state of adhering.(noun)

  source: webster1913