The term 'WHEEL BAR' is composed of two words: 'WHEEL' and 'BAR'. The word 'WHEEL' is a noun that refers to a circular object that rotates on an AXLE and is used for transportation or other purposes. The word 'BAR' is a noun that refers to a long, thin piece of metal, wood, or other material used for support or as a barrier. The crossword solution for the term 'WHEEL BAR' is 'AXLE', which is a noun that refers to a rod or spindle around which a WHEEL or set of wheels rotate.