The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning. The ear and hearing:anvil, audio-, auditory... This is the British English definition of tone deaf.
In addition, the V in V6 stands for the V or Vee engine. A V engine is a design that features cylinders and pistons aligned along two planes to form the familiar V shape. V engines are used in most cars due to their smaller size compared to inline engines.
VIN is an acronym for vehicle identification number. It is a serial number composed of numbers and letters. Each vehicle has a unique identification number that can be used by the Department of Motor Vehicles -- aka, the DMV-- to identify cars and other motor vehicles. The DMV is a government agency that handles regulations on land vehicles.