killer
kil-ler
noun
A person, animal, or thing that causes death.
"The police caught the serial killer."
noun
An extremely difficult challenge, or something outstandingly impressive.
"The final question was a real killer."
adjective
Extremely good, impressive, or highly effective.
"She wore a killer dress to the party."
Thesaurus
Synonyms: grampus, sea wolf, killer whale, Orcinus orca, orca, slayer, cause of death