Hygroscopy is the ability of a substance to absorb moisture from the atmosphere. Synonyms of this word include moisture absorption, moisture retention, and water absorption. Other possible synonyms include water retention, humidity absorption, and moisture adsorption. These terms are frequently used in the fields of chemistry, materials science, and engineering where humidity control is important. Hygroscopic materials are often utilized in the manufacturing of sensitive products like electronic devices, pharmaceuticals, and food items. By choosing the appropriate synonym for hygroscopy, scientists and engineers can effectively communicate the specific properties of materials and their intended applications.