dust sheet vs dust cover

dust sheet and dust cover both are nouns.

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

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

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

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