Are green peppercorn and capers the same thing?

No, green peppercorns and capers are not the same thing. Green peppercorns are unripe berries from the pepper plant, typically used as a spice with a mild, peppery flavor. In contrast, capers are the pickled flower buds of the caper bush, known for their tangy, briny taste. While both can add flavor to dishes, they come from different plants and have distinct culinary uses.