workload vs employment

workload and employment both are nouns.

Word	Noun	Adjective	Verb	Adverb
workload	Yes	No	No	No
employment	Yes	No	No	No

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

Other hypernyms of workload include work.

workload (noun)	employment (noun)
work that a person is expected to do in a specified time	the occupation for which you are paid
	the act of using
	the act of giving someone a job
	the state of being employed or having a job