noun (n)

• making or becoming suitable; adjusting to circumstances(noun.event)

  Synonym:
  accommodation, fitting
  

  source: wordnet30
• the act of making something different (as e.g. the size of a garment)(noun.act)

  Synonym:
  alteration, modification
  

  source: wordnet30
• the act of adjusting something to match a standard(noun.act)

  Synonym:
  readjustment, registration
  

  source: wordnet30
• the process of adapting to something (such as environmental conditions)(noun.process)

  Synonym:
  adaptation, adaption
  

  source: wordnet30
• an amount added or deducted on the basis of qualifying circumstances(noun.possession)

  Synonym:
  allowance
  

  source: wordnet30
• The act of adjusting, or condition of being adjusted; act of bringing into proper relations; regulation.(noun)

  source: webster1913