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Synonyms for plug

noun

  1. An implement to stop an opening

    cork, stopper, stopple, filling, stoppage, bung, spigot, river, wedge.

  2. An electrical fitting

    attachment plug, fitting, connection, wall plug, floor plug, plug fuse.

  3. A large pipe with a discharge valve

    water plug, fire hydrant, fire plug; see hydrant.

  4. Tobacco prepared for chewing

    cake of tobacco, chewing tobacco, twist, cut, baccy*, chew*, chaw*, chawin'*, chewin'*, pack of scrap*; see also tobacco.

  5. *An inferior horse

    hack, nag, plowhorse, scrub; see horse 1.

verb

stop, fill, obstruct, secure, ram, make tight, drive in; see also close 2.

See plug in Webster's New World Roget's A-Z Thesaurus II

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