packaging vs promotional material

packaging and promotional material both are nouns.

Word	Noun	Adjective	Verb	Adverb
packaging	Yes	No	No	No
promotional material	Yes	No	No	No

As nouns, packaging and promotional material are synonyms defined as:

packaging and promotional material: a message issued in behalf of some product or cause or idea or person or institution

Other synonyms of packaging include promo, promotion, publicity.

packaging (noun)	promotional material (noun)
the business of packing	a message issued in behalf of some product or cause or idea or person or institution
material used to make packages
a message issued in behalf of some product or cause or idea or person or institution