A sleeping partner is a term used to describe a silent partner in a business who does not participate in the daily operations but provides capital for the business. There are various synonyms for the term that can be used interchangeably; these synonyms include silent partner, inactive partner, financial partner, and investor. A silent partner is someone who invests in a business but does not get involved in the day-to-day running of the company or decision-making, while an inactive partner is someone who is not actively involved in the business operations. Similarly, a financial partner and an investor are those who provide funds for the business and share profits without any input in the operations.