cargo vs loading

cargo and loading both are nouns.

Word	Noun	Adjective	Verb	Adverb
cargo	Yes	No	No	No
loading	Yes	No	No	No

As nouns, cargo and loading are synonyms defined as:

Other synonyms of cargo include consignment, freight, lading, load, payload, shipment.

cargo (noun)	loading (noun)
goods carried by a large vehicle	the labor of putting a load of something on or in a vehicle or ship or container etc.
	goods carried by a large vehicle
	weight to be borne or conveyed
	a quantity that can be processed or transported at one time
	the ratio of the gross weight of an airplane to some factor determining its lift