English to English

noun (n)

• the combination of two or more commercial companies(noun.act)

  Synonym:
  amalgamation, uniting
  

  source: wordnet30
• an occurrence that involves the production of a union(noun.event)

  Synonym:
  fusion, unification
  

  source: wordnet30
• One who, or that which, merges.(noun)

  source: webster1913