noun (n)

• the act of drilling(noun.act)

  Synonym:
  boring
  

  source: wordnet30
• the act of drilling a hole in the earth in the hope of producing petroleum(noun.act)

  Synonym:
  boring, oil production
  

  source: wordnet30
• The act of piercing with a drill.(noun)

  source: webster1913
• The act of using a drill in sowing seeds.(noun)

  source: webster1913
• A heavy, twilled fabric of linen or cotton.(noun)

  source: webster1913