Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun breechblock

1 sense of breechblock

Sense 1
breechblock, breech closer -- (a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing)
       => blockage, block, closure, occlusion, stop, stoppage -- (an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe")