Synonyms for Employment (same or very similar meaning)
WordNet sense 1 (the state of being employed or having a job):
employWordNet sense 2 (the act of giving someone a job):
engagementWordNet sense 3 (the act of using):
exercise, usage, use, utilization, utilisation, useWordNet sense 4 (the occupation for which you are paid):
workFrom the ODE community, based on WordNetadd/edit