PMP, or Project Management Professional, is the most recognized certification for project managers. However, there are several other terms that are synonymous with PMP, such as CAPM (Certified Associate in Project Management), PMI-ACP (PMI Agile Certified Practitioner) and PRINCE2 (PRojects IN Controlled Environments). CAPM is an entry-level certification for individuals who want to establish a career in project management, while PMI-ACP is geared towards those who want to specialize in agile project management techniques. PRINCE2 is a popular certification for project managers in the UK and Europe, and it focuses on a structured approach to project management. These certifications are all valuable options for project managers looking to enhance their skills and advance their careers.