The term 'STOP A FLOW' can be solved by three different words: STAUNCH (7 letters), STEM (4 letters), and STANCH (6 letters). STAUNCH is an adjective meaning to stop or prevent the flow of something, such as a liquid or emotion. STEM is a verb meaning to stop or check the flow of something. STANCH is also a verb meaning to stop or check the flow of something, usually a liquid. All three words are used to describe the action of stopping or preventing the flow of something.