Synonyms for Grampus (same or very similar meaning)
WordNet sense 1 (predatory black-and-white toothed whale with large dorsal fin; common in cold seas):
killer, orca, killer whale, Orcinus orca, sea wolf
WordNet sense 2 (slaty-grey blunt-nosed dolphin common in northern seas):
Grampus griseus
From the ODE community, based on WordNet
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