noun (n)

• excessive accumulation of blood or other fluid in a body part

  berlebihan akumulasi darah atau cairan dalam tubuh bagian lain

  source: wordnet30
• excessive crowding

  berkerumun berlebihan

  Example:
  Traffic congestion.
  

  Synonym:
  over-crowding
  

  source: wordnet30
• The act of gathering into a heap or mass; accumulation.

  tindakan pengumpulan ke tumpukkan atau massa; pengumpulan.

  source: webster1913