data vs assemblage

data and assemblage both are nouns.

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

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

Other hypernyms of data include accumulation, aggregation, collection.

data (noun)	assemblage (noun)
a collection of facts from which conclusions may be drawn	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