octennial /ok-tenˈyəl, -i-əl/

1. Happening every eighth year
2. Lasting eight years

• Tanzanian
• Tao
• Taoiseach
• Taoiseachs
• Taoism
• Taoist
• Taoistic
• taonga
• taongas
• Taos
• tap
• tapa
• tapacolo
• tapacolos
• tapaculo
• tapaculos
• tapadera
• tapaderas
• tapadero
• tapaderos
• tapas
• tapas bar
• tapas bars
• tap bolt
• synaesthete