English to English

noun (n)

• an increase in the density of something(noun.event)

  Synonym:
  compression, concretion, densification
  

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

  Synonym:
  crunch, crush
  

  source: wordnet30
• The act of making compact, or the state of being compact.(noun)

  source: webster1913