Odobenidae vs mammal family

Odobenidae and mammal family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Odobenidae	Yes	No	No	No
mammal family	Yes	No	No	No

As nouns, mammal family is a hypernym of Odobenidae; that is, mammal family is a word with a broader meaning than Odobenidae:

Odobenidae (noun)	mammal family (noun)
walruses and extinct forms	a family of mammals