maxilla vs muzzle

maxilla

noun
  • An upper jaw especially of humans and other mammals in which the bony elements are closely fused. 

  • One of the first or second pair of mouthparts posterior to the mandibles in many arthropods that are used for tasting and manipulating food. 

  • Either of the two bones that lie with one on each side of the upper jaw lateral to the premaxilla and that in higher vertebrates bear most of the teeth. 

muzzle

noun
  • The protruding part of an animal's head which includes the nose, mouth and jaws. 

  • The mouth or the end for entrance or discharge of a gun, pistol etc., that the bullet emerges from. 

  • A piece of the forward end of the plow-beam by which the traces are attached. 

  • A device used to prevent an animal from biting or eating, which is worn on its snout. 

  • A person's mouth. 

verb
  • To bind or confine an animal's mouth by putting a muzzle, as to prevent it from eating or biting. 

  • To bring the muzzle or mouth near. 

  • To restrain (from speaking, expressing opinion or acting); to gag; to silence; to censor. 

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