coal car(n = noun.artifact) - freight car with fixed sides and no roof; for transporting coal;
is a kind of freight car

anthracite coal, armored car, armoured car, baggage car, bituminous coal, bovey coal, brown coal, buffet car, bumper car, cabin car, cable car, caking coal, canal coal, candle coal, cannel coal, car, car battery, car bomb, car boot sale, car care, car carrier, car company, car dealer, car door, car factory, car horn, car insurance, car loan, car maker, car manufacturer, car mile, car mileage, car mirror, car park, car part, car pool, car port, car race, car racing, car rental, car seat, car sickness, car tire, car traffic, car train, car transporter, car wheel, car window, cattle car, chair car, club car, coal, coal black, coal chute, coal gas, coal house, coal industry, coal mine, coal miner, coal miner's lung, coal oil, coal scuttle, coal seam, coal shovel, coal tar, coal tongs, coal works, compact car, dining car, drawing-room car, electric car, elevator car, estate car, freight car, gondola car, grip car, hard coal, hire car, jaunting car, jaunty car, kennel coal, lounge car, mail car, motor car, nonsmoking car, observation car, pace car, palace car, panda car, parlor car, parlour car, passenger car, patrol car, police car, prowl car, pullman car, race car, racing car, railroad car, railway car, refrigerator car, scout car, sea coal, secondhand car, sleeping car, smoking car, soft coal, sport car, sports car, squad car, steam coal, stock car, subcompact car, tank car, touring car, tow car, trolley car, wood coal