noun (n)

• healing process involving the growing together of the edges of a wound or the growing together of broken bones(noun.process)

  Synonym:
  union
  

  source: wordnet30
• the union of diverse things into one body or form or group; the growing together of parts(noun.act)

  Synonym:
  coalescence, coalescency, coalition, concretion
  

  source: wordnet30
• A gluing together; a joining by means of some tenacious substance; junction; union.(noun)

  source: webster1913