mobilization vs assemblage

mobilization and assemblage both are nouns.

Word	Noun	Adjective	Verb	Adverb
mobilization	Yes	No	No	No
assemblage	Yes	No	No	No

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

mobilization: act of marshaling and organizing and making ready for use or action
assemblage: the social act of assembling

Other hypernyms of mobilization include assembly, gathering.

mobilization (noun)	assemblage (noun)
act of marshaling and organizing and making ready for use or action	the social act of assembling
act of assembling and putting into readiness for war or other emergency:	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