freightage vs shipping

freightage and shipping both are nouns.

Word	Noun	Adjective	Verb	Adverb
freightage	Yes	No	No	No
shipping	Yes	No	No	No

As nouns, shipping is a hypernym of freightage; that is, shipping is a word with a broader meaning than freightage:

freightage: transporting goods commercially at rates cheaper than express rates
shipping: the commercial enterprise of moving goods and materials

Other hypernyms of freightage include transport, transportation.

freightage (noun)	shipping (noun)
transporting goods commercially at rates cheaper than express rates	the commercial enterprise of moving goods and materials
the charge for transporting something by common carrier	conveyance provided by the ships belonging to one country or industry