dust cover vs book jacket

dust cover and book jacket both are nouns.

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

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

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

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

dust cover (noun)	book jacket (noun)
a removable plastic protective covering for a piece of equipment	a paper jacket for a book; a jacket on which promotional information is usually printed
a large piece of cloth used to cover furniture that is not in use for a long period
a paper jacket for a book; a jacket on which promotional information is usually printed