Tetrahedral is a term used to describe shapes or structures that have four sides or faces. Some synonyms for tetrahedral include pyramidal, tetragonal, four-faced, foursquare, and quadrilateral. Pyramidal refers to shapes that resemble a pyramid and have a point at the top. Tetragonal means having four sides and right angles. Four-faced means a shape with four parallel sides or faces, and foursquare refers to a shape having four equal sides and right angles. Quadrilateral denotes any four-sided shape or structure. In summary, these synonyms help describe and identify tetrahedral structures, which are essential in the fields of chemistry, physics, and mathematics.