noun (n)

• an increase by natural growth or addition(noun.process)

  Synonym:
  accretion
  

  source: wordnet30
• several things grouped together or considered as a whole(noun.group)

  Synonym:
  aggregation, assemblage, collection
  

  source: wordnet30
• the act of accumulating(noun.act)

  Synonym:
  accrual, accruement
  

  source: wordnet30
• (finance) profits that are not paid out as dividends but are added to the capital base of the corporation(noun.possession)

  source: wordnet30
• The act of accumulating, the state of being accumulated, or that which is accumulated; as, an accumulation of earth, of sand, of evils, of wealth, of honors.(noun)

  source: webster1913