The antonyms for the word "frontpage" are numerous, but some of the most common ones include back page, last page, inner pages, and hidden pages. These words are often used in regards to printed publications such as newspapers, magazines, and books. While the front page is generally the most visible and attention-grabbing page, the opposite is true for the back or last page which may contain lesser news, footnotes, or obituaries. Inner pages can refer to any page within the publication that isn't the first or last, and hidden pages are pages that aren't easily accessible or intentionally concealed.