General terms:
* Peak: This is a general term for the highest point of a mountain.
* Summit: Similar to peak, it refers to the highest point of a mountain.
* Crest: This term is often used for the ridge line of a mountain, but can also apply to the top.
Specific terms for jagged peaks:
* Spire: This refers to a tall, pointed, and often very narrow rock formation, often found on the top of mountains.
* Pinnacle: Similar to a spire, but usually shorter and broader at the base.
* Aiguille: This term is French and literally means "needle," often used for tall, slender peaks.
Other terms:
* Horn: This term refers to a sharp peak formed by glacial erosion.
* Arête: This refers to a sharp, narrow ridge separating two valleys or glacial cirques.
The best term to use depends on the specific shape and formation of the mountain top you are describing.
