A crocket is a small, independent decorative element common in Gothic architecture. The name derives from the diminutive of the Old French croc, meaning "hook", due to the resemblance of a crocket to
Crocketed spire of the Notre-Dame Church in Vitré, France
A finial with several crockets, at Gore Hall, Harvard University
Crocket capitals on Laon Cathedral
A 20th century crocketed gable on Nidaros Cathedral, Trondheim
A finial or hip-knob is an element marking the top or end of some object, often formed to be a decorative feature.
Crocket
…the form of stylized carvings of curled leaves, buds or flowers, are used at regular intervals to decorate (for example) the sloping edges of spires, finials, pinnacles, and wimpergs. When crockets decorate the capitals of columns, these are called crocket capitals. Crocket capitals were particularly common…
Finial of the dome of the Taj Mahal
Kalasha finials on top of a gopuram
A slate roof in Syrrako (Greece), built with a curved valley layout and finials on top.
French Imperial Eagle finial on a regiment banner of the Grande Armée