octennial /ok-tenˈyəl, -i-əl/

1. Happening every eighth year
2. Lasting eight years

• needle-cases
• needlecord
• needlecords
• needlecraft
• needlecrafts
• needled
• needle exchange
• needle exchanges
• needlefish
• needlefishes
• needleful
• needlefuls
• needle-furze
• needle-furzes
• needle-gun
• needle-guns
• needle in a haystack
• needle paper
• needlepoint
• needle-pointed
• needlepoints
• needler
• needle roller-bearing
• needlers
• needles