The term 'TINY EAR BONE' is a crossword solution for the word ANVIL, which has five letters. The ANVIL is a tool used in metalworking and blacksmithing, and is shaped like a block with a flat top and a horn-like projection on one end. It is typically made of steel or iron and is used to shape and form metal by hammering it onto the ANVIL. The tiny ear bone is the smallest bone in the human body, located in the middle ear and known as the stapes. It is responsible for transmitting sound vibrations from the eardrum to the inner ear.