Ministereo, which is a combination of the words mini and stereo, is used to describe small portable audio devices. However, there are several other synonyms that can be used instead of ministereo, such as boombox, portable speaker, and wireless speaker. These terms are also used to describe small, portable audio devices that are perfect for personal use or small gatherings. Additionally, there are other terms such as pocket speaker, compact audio system, and portable music system, which are used interchangeably with ministereo to describe this versatile audio device. All these synonyms provide the same functionality as a ministereo, fitting a variety of needs and preferences.