noun (n)

• the quality of being brought into conformity with nature(noun.attribute)

  Synonym:
  naturalisation
  

  source: wordnet30
• the proceeding whereby a foreigner is granted citizenship(noun.act)

  source: wordnet30
• the introduction of animals or plants to places where they flourish but are not indigenous(noun.act)

  source: wordnet30
• changing the pronunciation of a borrowed word to agree with the borrowers' phonology(noun.act)

  Example:
  The naturalization in English of many Italian words.
  

  source: wordnet30
• The act or process of naturalizing, esp. of investing an alien with the rights and privileges of a native or citizen; also, the state of being naturalized.(noun)

  source: webster1913