pinnacle

noun

1. a lofty peak.
2. the highest or culminating point, as of success, power, fame, etc.: the pinnacle of one’s career.
3. any pointed, towering part or formation, as of rock.
4. Architecture. a relatively small, upright structure, commonly terminating in a gable, a pyramid, or a cone, rising above the roof or coping of a building, or capping a tower, buttress, or other projecting architectural member.

verb (used with object), pin·na·cled, pin·na·cling.

5. to place on or as on a pinnacle.
6. to form a pinnacle on; crown.

noun

1. the highest point or level, esp of fame, success, etc
2. a towering peak, as of a mountain
3. a slender upright structure in the form of a cone, pyramid, or spire on the top of a buttress, gable, or tower

verb (tr)

4. to set on or as if on a pinnacle
5. to furnish with a pinnacle or pinnacles
6. to crown with a pinnacle

n.c.1300, “mountain, peak, promontory,” from Old French pinacle “top, gable” (13c.) and directly from Late Latin pinnaculum “peak, pinnacle, gable,” diminutive of Latin pinna “peak, point,” (see pin (n.1)). Figurative use is attested from c.1400.