Speck is to dust as sliver is to w

I believe the answer to your question is "wood".  This is because people usually get slivers from wood, and considering the start of you last word, it seems to make sense.  Also the previous analogy thing, Speck is to dust, is a very realistic analogy thing, so the next one would probably need to be realistic.  I hope I helped!  And if you need more information, please tell me.  :D

Ahahaha the white van lol

Explanation: