Directory enquiries is a term that refers to a service that provides phone numbers and addresses for people and businesses. However, this term is often used interchangeably with similar expressions that describe the same service. Some of the synonyms for directory enquiries include phone directory, phone book, telephone directory, and yellow pages. These terms are commonly used by people who are looking for contact details for friends, family members, or businesses. Whether you're looking for a phone number or an address, these synonyms for directory enquiries can help you quickly find the information you need.