Black-seeded is a term that describes seeds that are dark in color. However, there are several synonyms that can be used to describe black-seeded varieties. Some of the commonly used synonyms for black-seeded include dark-seeded, obsidian, ebony, coal-colored, sable, jet-black, and ink-black. These terms can easily replace the word black-seeded and provide a more descriptive and colorful language. Additionally, using synonyms helps to avoid repetition in a text or conversation, keeping the language fresh and interesting. When looking for a term to describe seeds that are dark in color, any of these synonyms could be a perfect fit to convey the intended meaning.