Beta software is a term that refers to software that is still in the testing phase and may contain bugs or errors. Synonyms for beta software include pre-release software, release candidates, prototypes, and alpha versions. These terms all refer to software that is still in the developmental stage before it is ready for full release to the public. While these terms may have slightly different connotations, they all describe software that is not yet stable or guaranteed to be error-free. Beta software is often released to a select group of users for testing and feedback in order to improve the final product before it is widely released.