The crossword solution for the term 'LIKE LITERS' is 'METRIC', which is a 6-letter word. Metric is a system of measurement used in many countries around the world, based on the International System of Units (SI). It is used to measure length, mass, temperature, and other physical quantities. The metric system is based on the decimal system, meaning that all measurements are expressed in multiples of 10. For example, a liter is a unit of volume equal to one cubic decimeter, or 1000 cubic centimeters.