Collocations for workload - noun

enormous, heavy, huge
excessive
additional, extra, increased
maximal, maximum (both AmE)
peak
lighter, reduced
administrative

have
She has an increased workload this year.

expand, increase
ease, lighten, reduce
An assistant one day a week would ease my workload.

distribute, share, spread
We want to try and distribute the workload more evenly.

cope with, handle, manage

expand, increase
Doctors are having to cope with an ever-expanding workload.