clasp vs deadbolt

clasp

verb
  • To shut or fasten together with, or as if with, a clasp. 

  • To take hold of; to grasp. 

noun
  • A fastener or holder, particularly one that clasps. 

  • An embrace, a grasp, or handshake. 

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 clasp and deadbolt occurred in a corpus of books? (source: Google Ngram Viewer )