breech vs deadbolt

breech

verb
  • To fasten with breeching. 

  • To fit or furnish with a breech. 

adv
  • With the hips coming out before the head. 

noun
  • The part of a cannon or other firearm behind the chamber. 

  • A breech birth. 

  • A garment whose purpose is to cover or clothe the buttocks. 

  • The external angle of knee timber, the inside of which is called the throat. 

adj
  • Born, or having been born, breech. 

deadbolt

verb
  • To fasten or secure with a deadbolt. 

noun
  • A kind of lock in which the bolt (moving portion) is held in position by the cylinder rather than by a spring and so cannot be retracted except by turning the cylinder. 

  • The part of the lock which is moved when the key is engaged. 

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