The phrase "nor yet" is an old-fashioned way of saying "not yet" or "neither" in a negative sentence. It is a conjunction that is used to combine two negative statements or clauses. There are several synonyms for the phrase, including "neither nor," "not even," "not either," "not any more," "not at all," and "not as yet." Each of these synonyms adds variety to sentence structure and can help to avoid repetitive language. It is important to note, however, that the use of "nor yet" or its synonyms may sound formal or outdated in modern speech and writing.