carload vs gathering

carload and gathering both are nouns.

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

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

Other hypernyms of carload include assemblage.

carload (noun)	gathering (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	the act of gathering something
	sewing consisting of small folds or puckers made by pulling tight a thread in a line of stitching
	a group of persons together in one place