blister vs callus

blister

noun
  • A small bubble between the layers of the skin that contains watery or bloody fluid and is caused by friction and pressure, burning, freezing, chemical irritation, disease or infection. 

  • A type of pre-formed packaging made from plastic that contains cavities. 

  • A form of smelted copper with a blistered surface. 

  • An enclosed pocket of air, which may be mixed with water or solvent vapor, trapped between impermeable layers of felt or between the membrane and substrate. 

  • A bubble, as on a painted surface. 

  • Hyponyms: bulla, vesicle, vesicula. 

  • A cause of annoyance. 

  • A swelling on a plant. 

  • Something applied to the skin to raise a blister; a vesicatory or other applied medicine. 

verb
  • To break out in blisters. 

  • To sear after blaching. 

  • To raise blisters on. 

  • To have a blister form. 

  • To criticise severely. 

callus

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

  • 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. 

verb
  • To form such hardened tissue. 

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