| Main Entry: | |
| Part of Speech: | noun |
| Definition: | lock |
| Synonyms: | bar, bolt, catch, clamp, fastening, hasp, hook, padlock |
| Antonyms: | key |
| Main Entry: | bar |
| Part of Speech: | verb |
| Definition: | secure, usually with a length of material |
| Synonyms: | barricade, block, blockade, bolt, caulk, clog, close, dam, deadbolt, dike, fasten, fence, jam, latch, lock, plug, seal, secure, trammel, wall |
| Antonyms: | loosen, open, unfasten |
| Main Entry: | bolt |
| Part of Speech: | noun |
| Definition: | lock; part of lock |
| Synonyms: | bar, brad, catch, coupling, dowel, fastener, lag, latch, lock, nut, padlock, peg, pin, pipe, rivet, rod, screw, skewer, sliding bar, spike, stake, staple, stud |
| Antonyms: | key |
| Main Entry: | bolt |
| Part of Speech: | verb |
| Definition: | fasten securely |
| Synonyms: | bar, deadbolt, latch, lock, secure |
| Antonyms: | loosen, open, unbolt, unfasten, unlock |
| Main Entry: | catch |
| Part of Speech: | noun |
| Definition: | fastener |
| Synonyms: | bolt, buckle, clamp, clasp, clip, hasp, hook, hook and eye, latch, snap |
| Main Entry: | closure |
| Part of Speech: | noun |
| Definition: | plug, seal |
| Synonyms: | blockade, bolt, bung, cap, cork, fastener, latch, lid, obstruction, occludent, occlusion, padlock, stop, stopper, stopple, tampon, tap |
| Antonyms: | opening |
| Main Entry: | fastener |
| Part of Speech: | noun |
| Definition: | holder |
| Synonyms: | bolt, buckle, button, catch, clasp, fastening, latch, lock, rivet, screw, snap |
| Main Entry: | knob |
| Part of Speech: | noun |
| Definition: | lump, handle |
| Synonyms: | bulge, bulk, bump, bunch, doorknob, hump, knot, knurl, latch, lever, nub, opener, projection, protrusion, protuberance, snag, stud, swell, swelling, trigger, tumor |
| Main Entry: | lock |
| Part of Speech: | noun |
| Definition: | device that fastens and bars free passage |
| Synonyms: | bar, bolt, bond, catch, clamp, clasp, clinch, connection, fastening, fixture, grapple, grip, hasp, hook, junction, latch, link, padlock |
| Antonyms: | key |