The term 'soft mass' can be broken down into four crossword solutions: WAD (3 letters), PULP (4 letters), GOB (3 letters), and BOLUS (5 letters). WAD is a small lump or ball of soft material, such as clay or dough. PULP is a soft, moist, shapeless mass of matter. GOB is a large amount of something, usually soft or wet. Finally, a BOLUS is a large pill or rounded mass of a substance, often used in medicine. Together, these four words describe a soft, wet, shapeless mass of matter.