pinnacle

ot noun

1. The highest point.
2. A tall, sharp and craggy rock or mountain.
3. An all-time high; a point of greatest achievement or success.
4. An upright member, 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.

fe’l verb

1. To put something on a pinnacle.
2. To build or furnish with a pinnacle or pinnacles.