stuffing vs cushioning

stuffing and cushioning both are nouns.

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

As nouns, cushioning is a hypernym of stuffing; that is, cushioning is a word with a broader meaning than stuffing:

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

Other hypernyms of stuffing include padding.

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