As nouns the difference between blanket and tarp
is that
blanket is a heavy, loosely woven fabric, usually large and woollen, used for warmth while sleeping or resting while
tarp is short form of tarpaulin or
tarp can be (humorous|chiefly|internet slang).
As verbs the difference between blanket and tarp
is that
blanket is to cover with, or as if with, a blanket while
tarp is to cover something with a tarpaulin.
As an adjective blanket
is in general; covering or encompassing everything.