Single-sticker is a term commonly used to refer to a vehicle or a person who only has one registration sticker or license plate attached. However, there are several synonyms for this term that people can use to make their speech or writing more interesting. Some alternative words for single-sticker include sole sticker, one and only sticker, unique sticker, lone sticker, and solitary sticker. These terms can be used interchangeably with single-sticker to add variety to your language and style. So, next time you need to talk about someone or something with only one registration sticker, consider using one of these synonyms to make your message more memorable and engaging.