noun (n)

• a process of becoming larger or longer or more numerous or more important(noun.process)

  Synonym:
  growth, increase
  

  source: wordnet30
• the amount by which something increases(noun.attribute)

  Synonym:
  augmentation, increase
  Antonym:
  decrease, decrement
  

  source: wordnet30
• The act or process of increasing; growth in bulk, guantity, number, value, or amount; augmentation; enlargement.(noun)

  source: webster1913