The word "Quadrat" is not very commonly used in everyday language, but it is typically understood to mean a square or a four-sided shape. However, there are several synonyms that can be used in place of "Quadrat" to add variety and interest to your writing. These synonyms include "Square," "Tetractys," "Tessera," "Quadrangle," "Quadratic," and "Quadrate." Each of these words refers to something that has four equal sides, either in a geometric or metaphorical sense. Using these words in place of "Quadrat" can help to make your writing more engaging and dynamic, while still conveying the same basic meaning.