When something is not made public, there are a few different synonyms that can be used to convey the same idea. One option is to say that the information is confidential, which means that it is intended to be kept private and not shared with others. Another similar term is classified, which refers to information that is kept secret by a government or other organization for security reasons. Unpublished is another synonym that can be used to describe information that has not been shared publicly. Other options include restricted, undisclosed, and private, all of which can be used to indicate that information is not meant to be shared with the general public.