| drainplug | (noun) a removable plug for holding water in a tub or basin | - |
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| earplug | (noun) a plug of cotton, wax, or rubber that is fitted into the ear canal for protection against the entry of water or loud noise | - |
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| (noun) an earphone that is inserted into the ear canal | - |
| fireplug | (noun) an upright hydrant for drawing water to use in fighting a fire | Synonyms: fire hydrant, plug |
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| lug | (noun) marine worms having a row of tufted gills along each side of the back; often used for fishing bait | Synonyms: lobworm, lugworm |
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| (noun) a projecting piece that is used to lift or support or turn something | - |
| (noun) a sail with four corners that is hoisted from a yard that is oblique to the mast | Synonyms: lugsail |
| plug | (noun) an old or over-worked horse | Synonyms: hack, jade, nag |
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| (noun) blockage consisting of an object designed to fill a hole tightly | Synonyms: stopper, stopple |
| (noun) an upright hydrant for drawing water to use in fighting a fire | Synonyms: fire hydrant, fireplug |
| (noun) electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark | Synonyms: spark plug, sparking plug |
| (noun) an electrical device with two or three pins that is inserted in a socket to make an electrical connection | Synonyms: male plug |
| (noun) blatant or sensational promotion | Synonyms: ballyhoo, hoopla, hype |
| (noun) a wad of something chewable as tobacco | Synonyms: chaw, chew, cud, quid, wad |
| slug | (noun) (boxing) a blow with the fist | Synonyms: biff, clout, lick, poke, punch |
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| (noun) any of various terrestrial gastropods having an elongated slimy body and no external shell | - |
| (noun) a projectile that is fired from a gun | Synonyms: bullet |
| (noun) a strip of type metal used for spacing | Synonyms: type slug |
| (noun) an amount of an alcoholic drink (usually liquor) that is poured or gulped | - |
| (noun) an idle slothful person | Synonyms: sluggard |
| (noun) a counterfeit coin | - |
| (noun) a unit of mass equal to the mass that accelerates at 1 foot/sec/sec when acted upon by a force of 1 pound; approximately 14.5939 kilograms | - |