WordRel.com

• a war measure that isolates some area of importance to the enemy

  synonym	encirclement
  domain topic	armed forcesarmed servicesmilitarymilitary machinewar machine
  hypernym	actionmilitary action
  hyponym	beleagueringbesiegingmilitary blockadenaval blockadesiege

• prevents access or progress

  hypernym

  impedimentimpedimentaobstructerobstructionobstructor

• impose a blockade on

  synonym	seal off
  hypernym	beleaguerbesiegecircumventhem insurround

• obstruct access to

  synonym	block off
  hypernym	blockclose upimpedejamobstructobturateocclude

• render unsuitable for passage

  synonym	barbarricadeblockblock offblock upstop
  hypernym	blockclose upimpedejamobstructobturateocclude
  hyponym	block offcloseclose offshut off
  similar	blockobstruct

• hinder or prevent the progress or accomplishment of

  synonym	blockembarrasshinderobstructstymiestymy
  hypernym	forbidforecloseforestallprecludeprevent
  hyponym	bottleneckcheckfilibusterhangstonewall