Instrument
A 'task' is defined as follows:1) work that is assigned to a person by someone in authority2) any job that a person finds difficult or unpleasant
an instrument
An odious task is one that is deeply offensive and unpleasant, that you would really not want to have to do.
Because washing cloth diapers was a very unpleasant task.
I think the word you're looking for is "delegate."
a person who performs more than one task at the same time is usually called multitasker
you have to complete a task to get another task.
Herculean task
When one calls another a workhorse they are calling that person a hard working or stating that the person being called a workhorse has done the majority of the work in a group task.
The word "chore" is a noun because it refers to a routine task or job, typically one that is unpleasant or repetitive. Nouns name people, places, things, or ideas, and "chore" fits this definition as it represents an activity.
In active delegation, the person who is being delegated to asks permission for the delegation. In passive delegation, someone delegates a task to another person who did not ask for it.