Apex

Etymology
From apex:.

Noun

 * 1) The highest point of something.
 * the apex of the building
 * 1)  The moment of greatest success, expansion, etc.
 * the apex of civilization
 * 1) * 2002, Jeffrey Rowland, WIGU adventures
 * It would be an intense disgust. The absolute apex of teen angst.
 * 1)  The topmost vertex of a cone or pyramid (in their conventional orientation).
 * 2)  The pointed end of something.
 * 3) The lowest part of the human heart.
 * 4) The deepest part of a tooth's root.
 * 5)  The end of a leaf, petal or similar organ opposed to the end where it is attached to its support; the tip.
 * 6)  The point on the celestial sphere toward which the sun appears to move relative to nearby stars.

Synonyms

 * peak, top, summit
 * acme, culmination, height, peak, pinnacle
 * end, tip
 * See also Thesaurus:apex

Thesaurus
achievement; acme; aerial heights; alveolar ridge; alveolus; angle; apogee; arytenoid cartilages; attainment; back; bend; bifurcation; bight; blade; brow; cant; cap; capstone; chevron; climax; cloud nine; coin; consummation; corner; crank; crescendo; crest; crook; crotchet; crown; culmen; culmination; deflection; dizzy heights; dogleg; dorsum; edge; elbow; elevation; ell; eminence; ether; extreme limit; extremity; fork; furcation; hard palate; heaven; heavens; height; heights; high noon; highest pitch; highest point; hook; inflection; knee; larynx; last word; lift; limit; lips; maximum; meridian; mountaintop; nasal cavity; ne plus ultra; no place higher; nook; noon; noontide; oral cavity; palate; peak; pharyngeal cavity; pharynx; pinnacle; pitch; point; pole; prime; prominence; quoin; raise; realization; ridge; rise; rising ground; roof; seventh heaven; sky; soft palate; speech organ; spire; steep; stratosphere; summit; swerve; syrinx; teeth; teeth ridge; tip; tip-top; tongue; top; ultimate; upmost; upper extremity; uppermost; uprise; utmost; vantage ground; vantage point; veer; very top; vocal chink; vocal cords; vocal folds; vocal processes; voice box; zag; zenith; zig; zigzag