noun (n)

• the act of putting something in working order again(noun.act)

  Synonym:
  fix, fixture, mend, mending, repair, reparation
  

  source: wordnet30
• restraint that attaches to something or holds something in place(noun.artifact)

  Synonym:
  fastener, fastening, holdfast
  

  source: wordnet30
• the sterilization of an animal(noun.act)

  Synonym:
  altering, neutering
  

  source: wordnet30
• (histology) the preservation and hardening of a tissue sample to retain as nearly as possible the same relations they had in the living body(noun.act)

  Synonym:
  fixation
  

  source: wordnet30
• The act or process of making fixed.(noun)

  source: webster1913