Pepper, the most common of all savory spices, is best freshly ground, or coarsely cracked, or crushed, from whole peppercorns. Already ground pepper, black or white, is sold in grocery stores.
For other spices, see allspice, aniseeds, caraway, cardamom, cayenne pepper, chili powder, Chinese five-spice powder, cinnamon, cloves, coriander seeds, cumin, curry powder, fennel seeds, garam masala, ginger, juniper berries, mace, nutmeg, paprika, peppercorns, saffron, Sichuan pepper, star anise, sumac, and turmeric.