culmination

noun

The highest or climactic point of something, especially as attained after a long time.

SYNONYMS

apexapogeeapotheosisclimaxclosecompletionconclusionconsummationcrestcrowning momentdenouementfinalefinishheighthigh noonhigh pointhigh water markhighest pointpeakpinnaclesummitterminationtopvertexzenith