Stove pipe is a term used to refer to a type of metal chimney that is used to vent smoke or gas from a stove or furnace. If you are looking for synonyms for this term, there are a number of options available to you. Some of the most common include flue, chimney, exhaust pipe, and stack. Other possible synonyms might include ventilation pipe, fume pipe, or smokestack. Ultimately, the exact synonym that you choose will depend on the context and the specific usage of the term, but any of these options could be a good fit for a variety of situations.