mouth vs pharynx

mouth

noun
  • The opening of a creature through which food is ingested. 

  • The end of a river out of which water flows into a sea or other large body of water. 

  • The crosspiece of a bridle bit, which enters the mouth of an animal. 

  • An outlet, aperture or orifice. 

  • A loud or overly talkative person. 

verb
  • To form or cleanse with the mouth; to lick, as a bear licks her cub. 

  • To take into the mouth; to seize or grind with the mouth or teeth; to chew; to devour. 

  • To form a mouth or opening in. 

  • To carry in the mouth. 

  • To pick up or handle with the lips or mouth, but not chew or swallow. 

  • The prompter mouthed the words to the actor, who had forgotten them. 

  • To form with the mouth. 

  • To utter with a voice that is overly loud or swelling. 

  • To speak; to utter. 

  • To examine the teeth of. 

  • To make the actions of speech, without producing sound. 

  • To exit at a mouth (such as a river mouth) 

pharynx

noun
  • The part of the alimentary canal immediately behind the mouth in invertebrates that may be thickened and muscular, eversible and toothed, or adapted as a suctorial organ. 

  • The part of the alimentary canal and respiratory tract that extends from the back of the mouth and nasal cavity to the larynx and esophagus. 

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