noun (n)

• thin layers of rock used for roofing(noun.substance)

  Synonym:
  slate
  

  source: wordnet30
• a severely critical attack(noun.communication)

  Example:
  The reviewers gave his book a sound slating.
  

  source: wordnet30
• the act of laying slates for a roof(noun.act)

  source: wordnet30
• The act of covering with slate, slates, or a substance resembling slate; the work of a slater.(noun)

  source: webster1913