octennial /ok-tenˈyəl, -i-əl/

1. Happening every eighth year
2. Lasting eight years

• incalescence
• incalescences
• incalescent
• in calf
• in-calf
• in camera
• Incan
• incandesce
• incandesced
• incandescence
• incandescences
• incandescent
• incandescent lamp
• incandescent lamps
• incandescently
• empyemata
• empyemic
• empyeses
• empyesis
• empyreal
• empyrean
• empyreans
• empyreuma
• empyreumata
• empyreumatic