Peak.
Biretta
"Cap" in Latin can also be synonymous with "head" or "top."
Biretta
Another word for mountain ridge is arête which is the French word for edge or ridge.
Pingo
mountain lion
peaks...mountain peaks
Cap Polar ice cap Mountain ice cap
Another word for a cap with a tassel is "mortarboard." This term is commonly used to refer to the square academic cap worn during graduation ceremonies. It features a flat top and is often associated with academic achievements.
Tarn
heap, pile, mound, mountain, pyramid, tower.
knee cap