Java pepper, also known as cubeb pepper, is a spice that comes from the berries of the Piper cubeba plant. It has a slightly bitter taste, with a hint of camphor and a spicy, peppery flavor. If you're looking for synonyms to use when describing this spice, you might consider using terms like "cubeb," "tailed pepper," or "tailed cubebs." Other possible synonyms include "Java peppercorns," "wild pepper," or "comet's tails." Ultimately, the best synonym for this unique and flavorful spice will depend on the context in which it is being used.