A black-and-white toothed whale (Orcinus orca) that feeds on large fish, squid, and marine mammals such as seals and other whales and dolphins.
One that kills:
Risso's dolphin, Grampus griseus, with a blunt nose.
Find another word for killer-whale. In this page you can discover 5 synonyms, antonyms, idiomatic expressions, and related words for killer-whale, like: orca, killer, grampus, sea-wolf and orcinus-orca.