octingenary /ok-tin-jēˈnə-ri/ or octingentenary /-jen-tēˈnə-ri/

An eight-hundredth anniversary

• training pants
• trainings
• training ship
• training ships
• training shoe
• training wheels
• trainless
• train mile
• train miles
• train-oil
• trains
• trainspotter
• trainspotters
• trainspotting
• Train à Grande Vitesse
• traipse
• traipsed
• traipses
• traipsing
• traipsings
• trait
• traitor
• traitorhood
• traitorhoods
• traitorism