cachalot vs toothed whale

cachalot and toothed whale both are nouns.

Word	Noun	Adjective	Verb	Adverb
cachalot	Yes	No	No	No
toothed whale	Yes	No	No	No

As nouns, toothed whale is a hypernym of cachalot; that is, toothed whale is a word with a broader meaning than cachalot:

cachalot: large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris
toothed whale: any of several whales having simple conical teeth and feeding on fish etc.

cachalot (noun)	toothed whale (noun)
large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris	any of several whales having simple conical teeth and feeding on fish etc.