cushioning vs stuffing

cushioning and stuffing both are nouns.

Word	Noun	Adjective	Verb	Adverb
cushioning	Yes	No	No	No
stuffing	Yes	No	No	No

As nouns, stuffing is a hyponym of cushioning; that is, stuffing is a word with a more specific, narrower meaning than cushioning:

cushioning: artifact consisting of soft or resilient material used to fill or give shape or protect or add comfort
stuffing: padding put in mattresses and cushions and upholstered furniture

Other hyponyms of cushioning include cushion, falsie, pad.

cushioning (noun)	stuffing (noun)
artifact consisting of soft or resilient material used to fill or give shape or protect or add comfort	padding put in mattresses and cushions and upholstered furniture
	a mixture of seasoned ingredients used to stuff meats and vegetables