noun (n)

• an epiphytic vine or tree whose aerial roots extend down the trunk of a supporting tree and coalesce around it eventually strangling the tree(noun.plant)

  Synonym:
  strangler tree
  

  source: wordnet30
• someone who kills by strangling(noun.person)

  Synonym:
  choker, garroter, garrotter, throttler
  

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

  source: webster1913