family Ziphiidae vs family Hyperodontidae

family Ziphiidae and family Hyperodontidae both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Ziphiidae	Yes	No	No	No
family Hyperodontidae	Yes	No	No	No

As nouns, family Ziphiidae and family Hyperodontidae are synonyms defined as:

family Ziphiidae and family Hyperodontidae: beaked whales; in some especially former classifications included in the family Physeteridae

Other synonyms of family Ziphiidae include Hyperodontidae, Ziphiidae.

family Ziphiidae (noun)	family Hyperodontidae (noun)
beaked whales; in some especially former classifications included in the family Physeteridae	beaked whales; in some especially former classifications included in the family Physeteridae