case load vs workload

case load and workload both are nouns.

Word	Noun	Adjective	Verb	Adverb
case load	Yes	No	No	No
workload	Yes	No	No	No

As nouns, workload is a hypernym of case load; that is, workload is a word with a broader meaning than case load:

case load: the number of cases handled in a given period of time (as by a court or agency)
workload: work that a person is expected to do in a specified time

Other hypernyms of case load include work load.

case load (noun)	workload (noun)
the number of cases handled in a given period of time (as by a court or agency)	work that a person is expected to do in a specified time