Copyreaders are professionals who are responsible for correcting and proofreading written material. They play a vital role in publishing, advertising, journalism, and many other industries. If you're looking for synonyms to describe copyreaders, you might consider "proofreader," "corrector," "editor," or "checker." Each of these words denotes a professional who ensures that written material is error-free, easy to read, and engaging. Another synonym for "copyreader" might be "language specialist," as many copyreaders have training in the rules of grammar, punctuation, and syntax. Regardless of the term you use, copyreaders are an important part of ensuring that written material is high-quality and error-free.