Tessellate is a term used to describe the arrangement of shapes in a pattern. It can be used to refer to both two-dimensional and three-dimensional arrangements. The two crossword solutions for tessellate are TILE and MOSAIC. TILE is a four-letter word that refers to a flat, rectangular piece of material such as ceramic, stone, or glass, used to cover surfaces. MOSAIC is a six-letter word that refers to an artwork made up of small pieces of colored glass, stone, or other materials, arranged to form a picture or pattern. Both TILE and MOSAIC are examples of tessellation, which is the process of arranging shapes in a pattern.