rule book vs assemblage

rule book and assemblage both are nouns.

Word	Noun	Adjective	Verb	Adverb
rule book	Yes	No	No	No
assemblage	Yes	No	No	No

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

rule book: a collection of rules or prescribed standards on the basis of which decisions are made
assemblage: several things grouped together or considered as a whole

Other hypernyms of rule book include accumulation, aggregation, collection.

rule book (noun)	assemblage (noun)
a collection of rules or prescribed standards on the basis of which decisions are made	the social act of assembling
	a system of components assembled together for a particular purpose
	a group of persons together in one place
	several things grouped together or considered as a whole