Compact Mass is a term used to describe a solid, dense mass of material that has been compressed into a small area. The crossword solutions for this term are CLOD (4 letters), LUMP (4 letters), and WAD (3 letters). CLOD refers to a LUMP or chunk of soil or clay, while LUMP is a small, rounded mass of something, such as a piece of coal. WAD is a small, compact mass of material, such as a bundle of paper or cloth. All three words can be used to describe a Compact Mass.