pinnacle

A small turret or spire on a roof or buttress.

A tall pointed formation, such as a mountain peak.

The highest point; the culmination. synonym: summit.

To furnish with a pinnacle.

To place on or as if on a pinnacle.

A sharp point or peak; the very topmost point, as of a mountain.

In architecture, any relatively small structure (of whatever form, but commonly terminating in a cone or a pyramid) that rises above the roof or coping of a building, or caps a projecting architectural member, such as a buttress.

To put a pinnacle or pinnacles on; furnish with a pinnacle or pinnacles.

To place on or as on a pinnacle.

An architectural member, upright, and generally ending in a small spire, — used to finish a buttress, to constitute a part in a proportion, as where pinnacles flank a gable or spire, and the like. Pinnacles may be considered primarily as added weight, where it is necessary to resist the thrust of an arch, etc.