The word "trapeziform" refers to anything that resembles a trapezoid shape or has four sides that are not parallel. Synonyms for "trapeziform" include "trapezoidal," "irregular quadrilateral," "quadrilateral with one pair of parallel sides," and "trapezium-shaped." Other options to describe the same shape could be "deltoid," "diamond-shaped," or "kite-shaped." These terms could be useful in describing objects or structures that have a trapeziform shape, such as certain types of roofing or architectural features. By using different synonyms for "trapeziform," you can add variety to your writing and more accurately describe the shapes you are referring to.