Bibliothecal is a word that pertains to libraries or books. There are several synonyms for this word that you can use to sound more sophisticated in your conversations or writing. One alternative word for bibliothecal is "bibliographic," which refers to the study of books and their production, or "bibliothecary," which is an archaic term for a professional librarian. Other synonyms include "librarial," "librarian-like," "bookish," and "book-filled." Regardless of the synonym you choose, it is important to understand the context in which each word should be used. This will help you effectively communicate your message in a clear and concise manner while still sounding erudite.