Synonyms for Plug:

n.

brake pad, ABS, filling, Air brake, antilock braking system, brake fluid, river, acceleration, alternator, bottom gear, automatic transmission. banner, connection, billboard, circular, banner ad, classified ad, bumper sticker, fitting, advert, advertorial. crocodile clip, jack, cord, hydrant, lead, outlet, hookup, adapter, alligator clip, link, cable. endorse, market, launch, mail out, twist, tobacco, bill as, place, advertise, cut. carry, culvert, cesspit, conduit, scrub, horse, downspout, cutoff, airlock, back up. fill, full, trace, hint, a little, bit, a bit, sample, fragment, piece, fraction, taster. bandage, Puffery, braces, compress, corset, publicity, promotion, buildup, pitch, cotton ball, cast, band aid, cotton, collar, cane, knowledge, advertisement. spray, blast, take down, strafe, rake, shoot, pick off, blow away, blow someone's brains out. head, dowel, rivet, nail, pin, bolt, nut, butterfly nut. butt, briar, cigar, cigarette, cigarette paper, ciggy, cheroot. crowd, saturate, pack in, stock, cram. faucet, plughole, drainboard. artifact (noun)
stopper, stopple.
closure (noun)
fastener, closure, seal, lock.
hindrance (noun)
congestion, constraint, hindrance, drawback, barrier, frustration, deterrent, impasse, restriction, entanglement, complication, entrapment, interruption, constipation, impedance, stoppage, bafflement, restraint, blockage, hurdle, resistance, blockade, encumbrance, obstruction, obstacle, disadvantage, damper, opposition, inhibition, impediment.
publicity (noun)
hype, promotion, advertisement.
stop (noun)
cutoff.
stopper (noun)
cork, connection, spigot, filling, river, bung, fitting, stopple.

v.

change (verb)
plug away.
contact (verb)
secure, stop up.
hinder (verb)
bottleneck, bung, cramp, fetter, choke, complicate, encumber, obstruct, cripple, stay, clog, delay, hamper, handicap, baffle, crimp, check, snarl, constipate, block, dam, frustrate, constrain, tangle, hinder, jam, congest, restrict, impede, restrain, resist, detain, brake, drag, deter, thwart, entangle, interrupt, mire, snag, paralyze, stop, burden, bar, foul, oppose, entrap, hamstring, impair, catch, inhibit, counter, curb.
plug (verb)
close.
publicize (verb)
advertise.
stop up (verb)
close, fill, stopper, obstruct, choke, clog, block, secure, cover, seal, congest, stop.

Other synonyms:

endorse, pick off, bill as, plughole, dowel, drainboard, advertise, butterfly nut, market, strafe, mail out, Puffery. outlet, rivet, advertisement. nut, promotion, rake, publicity, fill. nail, spray. buildup. shoot. bolt, place. pin. pitch. blast. head. attachment
hookup.

Usage examples for plug

  1. This is a fact which we can vouch for, having seen the plug and heard the boulders rattling loudly over our head with each successive wave; but there is no danger here, because the cutting under the sea is narrow, and the rock solid and intensely hard. – Deep Down, a Tale of the Cornish Mines by R.M. Ballantyne
  2. I did nothing but plug one dull foot after the other. – Lore of Proserpine by Maurice Hewlett
  3. " Give me that plug I said, twisting it from his hand. – The Professor's Mystery by Wells Hastings Brian Hooker