[1] : WordNet (r) 2.0

iron curtain
     n : an impenetrable barrier to communication or information
         especially as imposed by rigid censorship and secrecy;
         used by winston churchill in 1946 to describe the
         demarcation between democratic and communist countries

[2] : Moby Thesaurus II by Grady Ward, 1.0

96 moby thesaurus words for "iron curtain":
   berlin wall, bolshevism, castroism, communist information bureau,
   communist party, maoism, marxian socialism, marxism,
   marxism-leninism, pillars of hercules, stalinism, titoism,
   trotskyism, arch dam, backstop, bamboo curtain, bank, bar, barrage,
   barrier, barrier of secrecy, bear-trap dam, beaver dam, blackout,
   boom, border, border ground, borderland, breakwater, breastwork,
   brick wall, buffer, bulkhead, bulwark, censorship, cofferdam,
   communism, curtain, dam, defense, democratic centralism,
   dialectical materialism, dike, ditch, earthwork, embankment, fence,
   frontier, frontier post, gate, gravity dam, groin, hush-up,
   hydraulic-fill dam, ironbound security, jam, jetty, leaping weir,
   levee, logjam, march, marches, marchland, milldam, moat, mole,
   mound, oath of secrecy, official secrecy, outpost, outskirts, pall,
   parapet, portcullis, rampart, repression, revisionism, roadblock,
   rock-fill dam, seal of secrecy, seawall, security, shutter dam,
   smothering, stifling, stone wall, suppression, three-mile limit,
   twelve-mile limit, veil, veil of secrecy, wall, weir, wicket dam,
   work, wraps

Curtain >> C Words
Curtain, definition of term: Curtain
curtain_pag1.html

Iron >> I Words
Iron, definition of term: Iron
iron_pag1.html

Curling Iron >> C Words
Curling Iron, definition of term: Curling Iron
curling+iron_pag1.html

Five Iron >> F Words
Five Iron, definition of term: Five Iron
five+iron_pag1.html

Crimping Iron >> C Words
Crimping Iron, definition of term: Crimping Iron
crimping+iron_pag1.html

Branding Iron >> B Words
Branding Iron, definition of term: Branding Iron
branding+iron_pag1.html

Cast Iron >> C Words
Cast Iron, definition of term: Cast Iron
cast+iron_pag1.html

Corrugated Iron >> C Words
Corrugated Iron, definition of term: Corrugated Iron
corrugated+iron_pag1.html

Angle Iron >> A Words
Angle Iron, definition of term: Angle Iron
angle+iron_pag1.html