tricentenary /trī-sen-tēˈnə-ri or -tenˈə-ri/

• ex cathedra
• excaudate
• excavate
• excavated
• excavates
• excavating
• excavation
• excavations
• excavator
• excavators
• exceed
• exceedance
• exceeded
• exceeding
• exceedingly
• exceeds
• excel
• excelled
• excellence
• excellences
• Excellencies
• excellency
• Excellency
• excellent
• excellently