vacuum bag vs dust bag

vacuum bag and dust bag both are nouns.

Word	Noun	Adjective	Verb	Adverb
vacuum bag	Yes	No	No	No
dust bag	Yes	No	No	No

As nouns, vacuum bag and dust bag are synonyms defined as:

vacuum bag and dust bag: a bag into which dirt is sucked by a vacuum cleaner

vacuum bag (noun)	dust bag (noun)
a bag into which dirt is sucked by a vacuum cleaner	a bag into which dirt is sucked by a vacuum cleaner