cookery book vs reference work

cookery book and reference work both are nouns.

Word	Noun	Adjective	Verb	Adverb
cookery book	Yes	No	No	No
reference work	Yes	No	No	No

As nouns, reference work is a hypernym of cookery book; that is, reference work is a word with a broader meaning than cookery book:

Other hypernyms of cookery book include book of facts, reference, reference book.

cookery book (noun)	reference work (noun)
a book of recipes and cooking directions	a book to which you can refer for authoritative facts