JOB (synonym) work (definition) refers to a role that includes the physical and social environment of the labor performed by an employee in exchange for a salary.
OCCUPATION (synonym) activity (definition) an action that a person spends time doing.
PROFESSION (synonym) career (definition) a type of task that requires special education, training or skills.
VOCATION (synonym) art (definition) a strong desire to spend your life doing a certain kind of work.