blockage, stoppage, occlusion, closure, block, stop - an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe"

bung, spile - a plug used to close a hole in a barrel or flask

cork - the plug in the mouth of a bottle (especially a wine bottle)

drainplug - a removable plug for holding water in a tub or basin

fipple - a wooden plug forming a flue pipe (as the mouthpiece of a recorder)

tampion - plug for the muzzle of a gun to keep out dust and moisture

tampon - plug of cotton or other absorbent material; inserted into wound or body cavity to absorb exuded fluids (especially blood)

spigot, tap - a plug for a bunghole in a cask

plug, stop up, secure - fill or close tightly with or as if with a plug; "plug the hole"; "stop up the leak"