Work is the act of producing or accomplishing something or the place where things are produced or accomplished. Work can be a noun (place, or thing) or a verb (an action) . Examples as a noun: I am at work. I am looking for work. Examples as a verb: I need to work. I am working hard on my homework. A job is a type of work (usually paid work). Job is normally used as a noun. Job can be a verb, but it is almost never used that way in everyday conversation and writing. Examples as a noun: Examples as a noun: I have a job. I need a job. My job is cleaning. Business is what you do to make money.It can also be used in place of responsibility or concern. Its is used as a noun. Example as "what you do to make money" : I will start a cleaning business. The business is making money. Examples as "responsibility/concern": Your safety is my business. The conversation is none of your business. When you put them together it can work like this: My job is working at a cleaning business.I need to find work because I lost my job at the cleaning business. My boss at my new job has no business asking about my health as long as I am able to work. I hope this helps!