packing vs packing material

packing and packing material both are nouns.

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

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

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

Other synonyms of packing include wadding.

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