cachalot vs sperm whale

cachalot and sperm whale both are nouns.

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

As nouns, cachalot and sperm whale are synonyms defined as:

cachalot and sperm whale: large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris

Other synonyms of cachalot include black whale, Physeter catodon.

cachalot (noun)	sperm whale (noun)
large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris	large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris