As nouns the difference between covers and blanket
is that
covers is plural of lang=en while
blanket is a heavy, loosely woven fabric, usually large and woollen, used for warmth while sleeping or resting.
As verbs the difference between covers and blanket
is that
covers is third-person singular of cover while
blanket is to cover with, or as if with, a blanket.
As an adjective blanket is
in general; covering or encompassing everything.