blue book vs brochure

blue book and brochure both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue book	Yes	No	No	No
brochure	Yes	No	No	No

As nouns, brochure is a hypernym of blue book; that is, brochure is a word with a broader meaning than blue book:

Other hypernyms of blue book include booklet, folder, leaflet, pamphlet.

blue book (noun)	brochure (noun)
a register of persons who are socially prominent	a small book usually having a paper cover
a report published by the British government; bound in blue
a blue booklet used in universities for writing examinations