The term 'Hammer or Anvil' can be solved by three different crossword solutions: BONE (4 letters), Bonelet (7 letters), and EARBONE (7 letters). BONE is a general term for the hard connective tissue that makes up the skeleton of most vertebrates. Bonelet is a diminutive form of the word BONE, meaning a small BONE. EARBONE is another name for the auditory ossicles, which are three tiny bones in the middle ear that transmit sound vibrations from the eardrum to the inner ear.