The word "mathest" does not exist in English. However, there are various synonyms that can be used for the word "mathematics" or "math". Some synonyms may include arithmetic, calculus, geometry, algebra, statistics, and trigonometry. These synonyms refer to different branches of mathematics that focus on various aspects of numbers, shapes, and patterns. Additionally, other terms such as numeracy, computational thinking, and quantitative reasoning can be used to describe the ability to understand and work with numbers and mathematical concepts. Regardless of the term used, mathematics remains an important subject that is essential for problem-solving, critical thinking, and decision-making in various aspects of life and work.