There are several synonyms for the term "aquifer test," which is a process of assessing the water-holding capacity and flow characteristics of an underground water-bearing formation. Some alternative phrases that can be used in place of aquifer test include pump test, slug test, and well test. A pump test involves pumping water from a well or borehole and measuring the water level response in surrounding observation wells. A slug test involves adding or removing water from a well and observing the changes in water level. A well test generally refers to a series of tests that are conducted on newly constructed or rehabilitated wells to evaluate their hydraulic performance. These synonyms all refer to methods of analyzing groundwater resources and can be useful in various applications such as water well design, groundwater modeling, and water resource management.