noun (n)

• gradual formation of new land, by recession of the sea or deposit of sediment(noun.process)

  source: wordnet30
• the rising of a body of water and its overflowing onto normally dry land(noun.phenomenon)

  Synonym:
  deluge, flood, inundation
  

  source: wordnet30
• clay or silt or gravel carried by rushing streams and deposited where the stream slows down(noun.object)

  Synonym:
  alluvial deposit, alluvial sediment, alluvium
  

  source: wordnet30
• Wash or flow of water against the shore or bank.(noun)

  source: webster1913