dust jacket vs book jacket

dust jacket and book jacket both are nouns.

Word	Noun	Adjective	Verb	Adverb
dust jacket	Yes	No	No	No
book jacket	Yes	No	No	No

As nouns, dust jacket and book jacket are synonyms defined as:

dust jacket and book jacket: a paper jacket for a book; a jacket on which promotional information is usually printed

Other synonyms of dust jacket include dust cover, dust wrapper.

dust jacket (noun)	book jacket (noun)
a paper jacket for a book; a jacket on which promotional information is usually printed	a paper jacket for a book; a jacket on which promotional information is usually printed