killer

1. Someone who causes the death of a person or animal (synset 110250784)
   is a type of: individual, mortal, person, somebody, someone, soul - a human being
   subtypes:

   • executioner, public executioner - an official who inflicts capital punishment in pursuit of a warrant
   • eradicator, exterminator, terminator - someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects)
   • choker, garroter, garrotter, strangler, throttler - someone who kills by strangling
   • liquidator, manslayer, murderer - a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)
   • poisoner - someone who kills with poison
   • regicide - someone who commits regicide; the killer of a king
   • felo-de-se, suicide - a person who kills himself intentionally
   same as: slayer
2. The causal agent resulting in death (synset 114564166)
   "heart disease is the biggest killer in the United States"
   is a type of: causal agency, causal agent, cause - any entity that produces an effect or is responsible for events or results
   same as: cause of death
3. A difficulty that is hard to deal with (synset 105696435)
   "that exam was a real killer"
   is a type of: difficulty - a factor causing trouble in achieving a positive result or tending to produce a negative result
4. Predatory black-and-white toothed whale with large dorsal fin;
   Common in cold seas (synset 102073946)
   is a type of: dolphin - any of various small toothed whales with a beaklike snout; larger than porpoises
   belongs to: genus orcinus, orcinus - killer whales
   same as: grampus, killer whale, orca, orcinus orca, sea wolf

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