bottleneck

• POS: Noun, Verb (transitive)
• HYPHEN: bot=tle=neck

CIDE DICTIONARY

bottleneck,  

•  a location or situation in which otherwise rapid progress is impeded.  [PJC]
•  a point at which road traffic slows due to congestion or narrowing of the roadway.  [PJC]
•  an impasse.  [PJC]
•  a narrowing.  [WordNet 1.5]

bottleneck, v. t. 

 same as obstruct; as, his laziness has bottlenecked our efforts to reform the system.  [WordNet 1.5]

bottleneck, v. i. 

 to become narrower as one approaches a point; -- said of roads; as, right by the bridge, the road bottlenecks.  [WordNet 1.5]

OXFORD DICTIONARY

bottleneck, n.
1 a point at which the flow of traffic, production, etc., is constricted.
2 a narrow place causing constriction.

THESAURUS

bottleneck

abbreviation, approach, astriction, astringency, asymptote, bar, barrier, blank wall, blind alley, blind gut, block, blockade, blockage, canal, catch, cecum, cervix, channel, choking, choking off, circumscription, clog, coarctation, collision course, compactedness, compaction, compression, compressure, concentralization, concentration, concourse, concurrence, condensation, confluence, conflux, congestion, congress, consolidation, constipation, constriction, constringency, contraction, contracture, convergence, converging, cordon, costiveness, crossing, cul-de-sac, curtailment, curtain, dead end, decrease, defile, determent, deterrent, difficulty, diminuendo, drawback, embolism, embolus, focalization, focus, funnel, gorge, hang-up, hazard, hitch, hourglass, hourglass figure, hub, hurdle, impasse, impediment, infarct, infarction, isthmus, jam, joker, knitting, meeting, mutual approach, narrow, narrow place, narrowing, narrowing gap, narrows, neck, objection, obstacle, obstipation, obstruction, obstructive, one small difficulty, pass, puckering, pursing, radius, reduction, rub, sealing off, shortening, snag, solidification, spokes, stop, stoppage, strait, stranglement, strangulation, striction, stricture, stumbling block, stumbling stone, systole, tangent, throat, wasp waist, wrinkling