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A word that means the same thing as task is "Objective."
The objective of a life skill is to complete a task that is self serving. The objective of feeding oneself is to acquire sustenance.
A task force meeting is a gathering of a task force group. A task force is a group of people who come together to work on a single task or objective.
being
the
goal
of
one's
actions is one meaning
It means a task, a thing you have to do
It would seem to me that the term "task" is more of an objective word in the sense that it takes work, to achieve a task