Linear units are measurement tools that we use to measure length and distance. There are many words that are synonymous with "linear unit", and understanding them can make communicating about measurements easier and more effective. These words include "length", "distance", "dimension", "magnitude", "size", "extent", "measurement", and "scale". Each of these words can be used to describe one-dimensional measurements, from the smallest to the largest, and with a range of units. When we use synonyms for "linear unit", we can better communicate about measurements in many fields, such as architecture, engineering, science, and more.