apex

summit, peak, pinnacle, climax, apex, acme, culmination mean the highest point attained or attainable. summit implies the topmost level attainable <at the summit of the Victorian social scene>. peak suggests the highest among other high points <an artist working at the peak of her powers>. pinnacle suggests a dizzying and often insecure height <the pinnacle of worldly success>. climax implies the highest point in an ascending series <the war was the climax to a series of hostile actions>. apex implies the point where all ascending lines converge <the apex of Dutch culture>. acme implies a level of quality representing the perfection of a thing <a statue that was once deemed the acme of beauty>. culmination suggests the outcome of a growth or development representing an attained objective <the culmination of years of effort>.