killer whale vs sea wolf

killer whale and sea wolf both are nouns.

Word	Noun	Adjective	Verb	Adverb
killer whale	Yes	No	No	No
sea wolf	Yes	No	No	No

As nouns, killer whale and sea wolf are synonyms defined as:

killer whale and sea wolf: predatory black-and-white toothed whale with large dorsal fin; common in cold seas

Other synonyms of killer whale include grampus, killer, orca, Orcinus orca.

killer whale (noun)	sea wolf (noun)
predatory black-and-white toothed whale with large dorsal fin; common in cold seas	predatory black-and-white toothed whale with large dorsal fin; common in cold seas