callus vs claw

callus

noun
  • A shining area on the frons of many species of Tabanomorpha (horse flies and relatives). 

  • The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece. 

  • The new formation over the end of a cutting, before it puts out rootlets. 

  • A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use. 

verb
  • To form such hardened tissue. 

claw

noun
  • The pincer (chela) of a crustacean or other arthropod. 

  • A curved, pointed horny nail on each digit of the foot of a mammal, reptile, or bird. 

  • A mechanical device resembling a claw, used for gripping or lifting. 

  • A slender appendage or process, formed like a claw, such as the base of petals of the pink. 

  • The act of catching a ball overhand. 

  • A human fingernail, particularly one extending well beyond the fingertip. 

  • A foot equipped with such. 

verb
  • To scratch or to tear at. 

  • To use the claws to climb. 

  • To perform a claw catch. 

  • To use the claws to seize, to grip. 

  • To move with one's fingertips. 

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