Antonyms for the term "Absorbable Gelatin Sponges" could include reusable, impermeable, non-porous, non-absorbent, non-spongy, non-permeable and non-absorbing. Unlike Absorbable Gelatin Sponges that can absorb fluids and are used in medical surgeries, these antonyms refer to materials that do not absorb fluids, cannot be reused, and are usually water-resistant. Non-porous materials like metals and plastics are preferred for a variety of industrial applications where fluid absorption is not necessary. Similarly, non-spongy materials like rubber, foam, or plastics are preferred for use in packaging, insulation, and cushioning purposes where absorption is not required.