The Collaborative International Dictionary of English v.0.48:

Junction \Junc"tion\, n. [L. junctio, fr. jungere, junctum, to
   join: cf. F. jonction. See Join.]
   [1913 Webster]
   1. The act of joining, or the state of being joined; union;
      combination; coalition; as, the junction of two armies or
      detachments; the junction of paths.
      [1913 Webster]

   2. The place or point of union, meeting, or junction;
      specifically, the place where two or more lines of railway
      meet or cross.
      [1913 Webster]

   Junction plate (Boilers), a covering or break-join plate
      riveted to and uniting the edges of sheets which make a
      butt joint.

   Junction rails (Railroads), the switch, or movable, rails,
      connecting one line of track with another.
      [1913 Webster]

U.S. Gazetteer (1990):

Junction, IL (village, FIPS 38778)
  Location: 37.72296 N, 88.23779 W
  Population (1990): 201 (84 housing units)
  Area: 2.3 sq km (land), 0.0 sq km (water)
  Zip code(s): 62954
Junction, TX (city, FIPS 38248)
  Location: 30.48958 N, 99.77099 W
  Population (1990): 2654 (1247 housing units)
  Area: 5.9 sq km (land), 0.0 sq km (water)
  Zip code(s): 76849
Junction, UT (town, FIPS 39590)
  Location: 38.23837 N, 112.22406 W
  Population (1990): 132 (108 housing units)
  Area: 37.2 sq km (land), 1.5 sq km (water)
Junction, WV
  Zip code(s): 26824

Moby Thesaurus II by Grady Ward, 1.0:

310 Moby Thesaurus words for "junction":
   Anschluss, L, abutment, abuttal, access, accession, accompaniment,
   accord, accordance, accretion, addition, adherence, adhesion,
   adjacency, adjoiningness, adjunct, adjunction, affairs,
   affiliation, affinity, affixation, agglomeration, agglutination,
   aggregation, agreement, aisle, alley, alliance, amalgamation,
   ambulatory, annexation, aperture, apposition, approximation,
   appulse, arcade, artery, articulation, assemblage, assembly,
   assimilation, association, attachment, augmentation, avenue, blend,
   blending, bond, bracketing, branch, building, buildup, cabal,
   cable railway, cahoots, call-up, canvass, cartel, census,
   centralization, channel, cling, clinging, cloister, closeness,
   clotting, clustering, co-working, coaction, coagulation,
   coalescence, coalition, cog railway, coherence, cohesion,
   cohesiveness, coincidence, collaboration, collection, collectivity,
   colligation, collocation, collusion, colonnade, combination,
   combine, combined effort, combo, communication, compaction,
   comparison, composition, compound, concatenation, concert,
   concerted action, concomitance, concordance, concourse, concretion,
   concurrence, condensation, conduit, confederacy, confederation,
   confluence, conflux, congealment, congelation, congeries,
   conglobation, conglomeration, congregation, conjoining,
   conjugation, conjunction, connectedness, connection, consilience,
   consolidation, conspiracy, constitution, construction,
   conterminousness, contiguity, contrariety, convergence,
   cooperation, copulation, corralling, correspondence, corridor,
   coterminousness, coupling, covered way, crossroads, data-gathering,
   dealings, deduction, defile, disjunction, ecumenism, el,
   electric railway, elevated, elevated railway, embankment,
   embodiment, encompassment, enosis, exit, fabrication, fashioning,
   federalization, federation, feeder, feeder line, ferry, filiation,
   ford, formation, fusion, gallery, gathering, getup,
   gravity-operated railway, homology, hookup, horse railway,
   inclusion, incorporation, increase, ingathering, inlet,
   inseparability, integration, interchange, intercommunication,
   intercourse, interlinking, intersection, intimacy, inventory,
   joinder, joining, jointure, junction, juncture, junta,
   juxtaposition, knotting, lane, league, liaison, light railroad,
   line, link, linkage, linking, main line, make, makeup, marriage,
   meeting, meld, melding, merger, merging, metro, mixture,
   mobilization, monorail, muster, mutual attraction, nearness,
   opening, organization, outlet, overpass, package, package deal,
   pairing, parasitism, pass, passage, passageway, perigee,
   perihelion, piecing together, portico, prefixation, propinquity,
   proximity, putting together, rack railway, rack-and-pinion railway,
   rail, rail line, railroad, railroad tunnel, railway, rapport,
   reinforcement, relatedness, relation, relations, relationship,
   roadbed, roadway, rodeo, roundup, saprophytism, seam, set, setup,
   shaping, sidetrack, siding, similarity, simultaneity,
   solidification, splice, sticking, street railway, streetcar line,
   structure, structuring, subway, suffixation, superaddition,
   superfetation, superjunction, superposition, supplementation,
   survey, switchback, symbiosis, sympathy, synchronism, syncretism,
   syndication, syneresis, synergy, synthesis, syzygy, terminal,
   terminus, tie, tie-in, tie-up, track, traject, trajet, tram,
   tramline, trestle, trolley line, trunk, trunk line, tube, tunnel,
   turnout, underground, underpass, unification, union, united action,
   uniting, wedding, yoking