spindle vs holding device

spindle and holding device both are nouns.

Word	Noun	Adjective	Verb	Adverb
spindle	Yes	No	No	No
holding device	Yes	No	No	No

As nouns, holding device is a hypernym of spindle; that is, holding device is a word with a broader meaning than spindle:

spindle (noun)	holding device (noun)
a stick or pin used to twist the yarn in spinning	a device for holding something
any of various rotating shafts that serve as axes for larger rotating parts
a piece of wood that has been turned on a lathe; used as a baluster, chair leg, etc.
any holding device consisting of a rigid, sharp-pointed object
(biology) tiny fibers that are seen in cell division; the fibers radiate from two poles and meet at the equator in the middle