borer vs perforator

borer

noun
  • A tool used for drilling. 

  • A person who bores or drills; a person employed to drill bore holes. 

  • A cyclostome, such as a hagfish, which bores into injured, dead, or decaying sea creatures to feed on their flesh. 

  • One of the many types of mollusc that bore into soft rock. 

  • A knife fit for a stabbing. 

  • A tedious person; a person who bores others; a bore. 

  • An insect or insect larva that bores into wood. 

perforator

noun
  • A tool or machine that makes holes, or perforates, materials such as paper and card. 

  • A perforating artery or vein 

  • A machine that can bore a tunnel underground 

How often have the words borer and perforator occurred in a corpus of books? (source: Google Ngram Viewer )