lading vs payload

lading and payload both are nouns.

Word	Noun	Adjective	Verb	Adverb
lading	Yes	No	No	No
payload	Yes	No	No	No

As nouns, lading and payload are synonyms defined as:

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

lading (noun)	payload (noun)
goods carried by a large vehicle	goods carried by a large vehicle
	the front part of a guided missile or rocket or torpedo that carries the nuclear or explosive charge or the chemical or biological agents