pincushion vs cushion

pincushion and cushion both are nouns.

Word	Noun	Adjective	Verb	Adverb
pincushion	Yes	No	No	No
cushion	Yes	No	Yes	No

As nouns, cushion is a hypernym of pincushion; that is, cushion is a word with a broader meaning than pincushion:

pincushion: a small stiff cushion into which pins are stuck ready for use
cushion: a soft bag filled with air or a mass of padding such as feathers or foam rubber etc.

pincushion (noun)	cushion (noun)
a small stiff cushion into which pins are stuck ready for use	a soft bag filled with air or a mass of padding such as feathers or foam rubber etc.
	a mechanical damper; absorbs energy of sudden impulses
	the layer of air that supports a hovercraft or similar vehicle

pincushion (verb)	cushion (verb)
	protect from impact