stuff vs stuffing

stuff and stuffing both are nouns.

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

stuff (noun)	stuffing (noun)
miscellaneous unspecified objects	padding put in mattresses and cushions and upholstered furniture
unspecified qualities required to do or be something	a mixture of seasoned ingredients used to stuff meats and vegetables
a critically important or characteristic component
senseless talk
information in some unspecified form
informal terms for personal possessions
the tangible substance that goes into the makeup of a physical object

stuff (verb)	stuffing (verb)
fill with a stuffing while cooking
fill tightly with a material
treat with grease, fill, and prepare for mounting
overeat or eat immodestly; make a pig of oneself
cram into a cavity
obstruct
press or force