There are various synonyms that can be used instead of the term "nearly correct". Some of the most common ones include "almost right", "partially accurate", "close enough", "within range", "not far off", "not entirely wrong", "near enough", "more or less correct", and "approaching correctness". These terms can be used interchangeably depending on the context in which they are being used. So, if you want to emphasize that something is close to being correct without fully hitting the mark, you can use any of these synonyms to effectively convey your message.