Line of work is a common phrase that is often used to refer to someone's profession or occupation. However, there are many other synonyms that can be used to describe a person's career or job. Some of these synonyms include vocation, livelihood, occupation, trade, profession, calling, craft and career. Each of these words has its own nuances and connotations, but they all refer to the same general concept of a person's work or employment. So, whether you're a doctor, lawyer, writer, teacher or entrepreneur, there are many ways to describe your line of work.