noun (n)

• the bodily process of discharging waste matter(noun.process)

  Synonym:
  elimination, evacuation, excreting, voiding
  

  source: wordnet30
• waste matter (as urine or sweat but especially feces) discharged from the body(noun.substance)

  Synonym:
  body waste, excrement, excreta, excretory product
  

  source: wordnet30
• The act of excreting.(noun)

  source: webster1913