dust cover vs dust sheet

dust cover and dust sheet both are nouns.

Word	Noun	Adjective	Verb	Adverb
dust cover	Yes	No	No	No
dust sheet	Yes	No	No	No

As nouns, dust cover and dust sheet are synonyms defined as:

dust cover and dust sheet: a large piece of cloth used to cover furniture that is not in use for a long period

dust cover (noun)	dust sheet (noun)
a removable plastic protective covering for a piece of equipment	a large piece of cloth used to cover furniture that is not in use for a long period
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