noun (n)

• the rising of a body of water and its overflowing onto normally dry land(noun.phenomenon)

  Example:
  Plains fertilized by annual inundations.
  

  Synonym:
  alluvion, deluge, flood
  

  source: wordnet30
• an overwhelming number or amount(noun.quantity)

  Synonym:
  deluge, flood, torrent
  

  source: wordnet30
• The act of inundating, or the state of being inundated; an overflow; a flood; a rising and spreading of water over grounds.(noun)

  source: webster1913