noun (n)

• the Roman Catholic doctrine that the whole substance of the bread and the wine changes into the substance of the body and blood of Christ when consecrated in the Eucharist(noun.cognition)

  source: wordnet30
• an act that changes the form or character or substance of something(noun.act)

  Synonym:
  transmutation
  

  source: wordnet30
• A change into another substance.(noun)

  source: webster1913