The word "pumper" is a noun that typically refers to a person or machine which is used for pumping liquids such as water or gas. There are several synonyms which can be used to describe the same or similar functions. Words such as pump, siphon, hydrant, and well can be used in place of "pumper." In addition, words such as dispenser, irrigator, and diffuser can be used to describe the action of distributing liquid in a controlled manner. Similarly, synonyms such as injector, sprayer, and atomizer describe the action of releasing liquid particles into the air. All of these words are useful when describing equipment, people, or processes related to the movement or distribution of liquids.