Smoke stack, also called a chimney or flue, is a vertical structure that emits smoke or hot gases as a result of industrial activities or combustion processes. However, there are several synonyms for smoke stack, offering different connotations and contexts. For instance, smokestack can be replaced with stack, exhaust pipe, fume stack, or vent. The term flue can also be used interchangeably with smokestack when referring to heating and ventilation systems. Moreover, the word funnel or cowl can describe a chimney that has a wider base and narrows towards the top. Hence, these synonyms of smoke stack enrich the English language and allow for precise communication in various domains.