freight vs payload

freight and payload both are nouns.

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

As nouns, freight and payload are synonyms defined as:

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

freight (noun)	payload (noun)
transporting goods commercially at rates cheaper than express rates	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
the charge for transporting something by common carrier

freight (verb)	payload (verb)
load with goods for transportation
transport commercially as cargo