freight vs shipment

freight and shipment both are nouns.

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

As nouns, freight and shipment are synonyms defined as:

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

freight (noun)	shipment (noun)
transporting goods commercially at rates cheaper than express rates	the act of sending off something
goods carried by a large vehicle	goods carried by a large vehicle
the charge for transporting something by common carrier

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