entrenchment

from WordNet (r) 3.0 (2006)

entrenchment
    n 1: an entrenched fortification; a position protected by
         trenches [syn: {entrenchment}, {intrenchment}]

from The Collaborative International Dictionary of English v.0.48

entrenchment \entrenchment\ n.
   1. an entrenched fortification; a position protected by
      trenches.

   Syn: intrenchment.
        [WordNet 1.5]

   2. the act or process of entrenching.
      [PJC] entrepot

from Moby Thesaurus II by Grady Ward, 1.0

74 Moby Thesaurus words for "entrenchment":
      abri, approach trench, aqueduct, bunker, canal, canalization,
      channel, communication trench, confirmation, countermine, coupure,
      crimp, cut, deep-rootedness, deep-seatedness, dike, ditch,
      double sap, dugout, embedment, encroachment, entrance,
      establishment, fire trench, fixation, fixedness, fixity, fixture,
      flying sap, fortified tunnel, fosse, foxhole, gallery, goffer,
      gutter, ha-ha, impingement, implantation, imposition, incursion,
      infiltration, infixion, influx, infringement, injection, inroad,
      insinuation, interference, interjection, interloping,
      interposition, interposure, interruption, intervention, intrusion,
      invasion, inveteracy, irruption, kennel, mine, moat, obtrusion,
      parallel, pleat, sap, slit trench, stabilization, sunk fence,
      trench, trespass, trespassing, trough, tunnel, unlawful entry