brochure vs blue book

brochure and blue book both are nouns.

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

As nouns, blue book is a hyponym of brochure; that is, blue book is a word with a more specific, narrower meaning than brochure:

Other hyponyms of brochure include ticket book.

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