packing material vs packing

packing material and packing both are nouns.

Word	Noun	Adjective	Verb	Adverb
packing material	Yes	No	No	No
packing	Yes	No	No	No

As nouns, packing material and packing are synonyms defined as:

packing material and packing: any material used especially to protect something

Other synonyms of packing material include wadding.

packing material (noun)	packing (noun)
any material used especially to protect something	the enclosure of something in a package or box
	carrying something in a pack on the back
	any material used especially to protect something