A Pointed Hilltop is called A Peak.
peak
It is a steeple
The pinnacle or point.
The word you are looking for is "tapering." It is used to describe something that narrows or converges towards a pointed end or top.
A pointed hilltop is a peak or summit of a hill that comes to a narrow or sharp point at the top, resembling the shape of a triangle or cone when viewed from a distance. These pointed hilltops can offer stunning panoramic views of the surrounding landscape.
a spire or steeple
Mountain
. stalactite
The top pointed tip of the lung is the apex, while the pointed tip on the bottom of the left lung is called the lingula.
obelisk
They both have a pointed top
A Tangelo! I grow them in my backyard.