carload vs assemblage

carload and assemblage both are nouns.

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

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

Other hypernyms of carload include gathering.

carload (noun)	assemblage (noun)
a gathering of passengers sufficient to fill an automobile	the social act of assembling
the amount of cargo that can be held by a boat or ship or a freight car	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