carload vs boatload

carload and boatload both are nouns.

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

As nouns, carload and boatload are synonyms defined as:

carload and boatload: the amount of cargo that can be held by a boat or ship or a freight car

Other synonyms of carload include shipload.

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