Mortars' Mates is a term used to describe the job of a person who works with a mortar and pestle. The crossword solution for Mortars' Mates is Pestles, which is a seven-letter word. A pestle is a tool used to grind and mix substances in a mortar, which is a bowl-shaped container. Mortars' Mates are typically employed in the pharmaceutical industry, where they use the mortar and pestle to mix and grind ingredients for medicines.