What Can I Substitute For Whole Ground Spice?

What Can I Substitute For Whole Ground Spice? Peppercorns (black, green, white, red, or pink): 1 teaspoon whole ≈ 1 scant teaspoon ground. Allspice: 1 teaspoon whole ≈ 3⁄4 teaspoon ground. Juniper: 1 teaspoon whole ≈ 3⁄4 teaspoons ground. What is the difference between whole and ground spices? Spices are often dried to preserve them