cookbook vs reference work

cookbook and reference work both are nouns.

Word	Noun	Adjective	Verb	Adverb
cookbook	Yes	No	No	No
reference work	Yes	No	No	No

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

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

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