rate vs freightage

rate and freightage both are nouns.

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

As nouns, freightage is a hyponym of rate; that is, freightage is a word with a more specific, narrower meaning than rate:

rate (noun)	freightage (noun)
the relative speed of progress or change	transporting goods commercially at rates cheaper than express rates
amount of a charge or payment relative to some basis	the charge for transporting something by common carrier
a quantity or amount or measure considered as a proportion of another quantity or amount or measure
a magnitude or frequency relative to a time unit

rate (verb)	freightage (verb)
assign a rank or rating to
estimate the value of
be worthy of or have a certain rating