bar, bind, block, block up, blockade, bung, chink, choke, choke off, choke up, clog, clog up, congest, constipate, cork, cover, dam, dam up, fill, fill up, foul, jam, obstipate, obstruct, pack, plug, plug up, spile, stanch, stay, stench, stop, stop up, stopper, stopple, stuff, stuff up