The word "deflectometer" is a specific term used in engineering and mechanics to describe an instrument used for measuring the deflection, or bending, of a material under a load. However, there are several other words and phrases that can be used to describe similar instruments or devices used in this context. These synonyms include deflection gauges, load testers, deformation meters, and strain indicator tools. Each of these terms highlights a slightly different aspect of the tool, such as its focus on measuring the degree of bending versus the amount of pressure or load being applied to the material. Ultimately, all of these words point to a valuable tool in testing and analyzing the physical characteristics of various materials.