sexennial /sek-senˈyəl or -senˈi-əl/

1. Lasting six years
2. Recurring every six years

• needle-pointed
• needlepoints
• needler
• needle roller-bearing
• needlers
• needles
• needless
• needlessly
• needlessness
• needlessnesses
• needlestick
• needle time
• needle-tin
• needle valve
• needle valves
• needlewoman
• needlewomen
• needlework
• needleworks
• needlier
• needliest
• needling
• needly
• needment
• needments