Answer: capstone

AnswerCrossword Clue
CAPSTONECrowning achievement
CAPSTONEMost notable achievement
CAPSTONEHighest point
CAPSTONEAcme of achievement
CAPSTONEHighest point of achievement
CAPSTONECrowning event
CAPSTONETurret topper
CAPSTONEIt's placed last
capstonefinishing stone of a structure
capstonethe top stone of a sculpture
capstonethe crowning achievement, point, element, or event