Ziphiidae vs Hyperodontidae

Ziphiidae and Hyperodontidae both are nouns.

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

As nouns, Ziphiidae and Hyperodontidae are synonyms defined as:

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

Other synonyms of Ziphiidae include family Hyperodontidae, family Ziphiidae.

Ziphiidae (noun)	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