WordNet (r) 3.0 (2006):

setup
    n 1: equipment designed to serve a specific function [syn:
         apparatus, setup]
    2: the way something is organized or arranged; "it takes time to
       learn the setup around here"
    3: an act that incriminates someone on a false charge [syn:
       frame-up, setup]

Moby Thesaurus II by Grady Ward, 1.0:

152 Moby Thesaurus words for "setup":
   anatomy, approach, architectonics, architecture, arrangement,
   array, assemblage, assembly, attack, blueprint, blueprinting,
   breeze, build, building, buildup, calculation, charting, cinch,
   combination, composition, compound, conception, concord,
   conformation, constitution, construction, contrivance, creation,
   deployment, design, device, disposal, disposition, duck,
   easy target, easy thing, embodiment, enterprise, envisagement,
   fabric, fabrication, fashion, fashioning, figuring, foresight,
   forethought, forging, form, format, formation, frame, frame-up,
   game, getup, graphing, ground plan, guidelines, harmony, idea,
   incorporation, intention, junction, layout, lineup,
   long-range plan, make, makeup, making, manufacture, mapping,
   marshaling, master plan, method, methodology, mixture, mold,
   molding, operations research, order, organic structure, organism,
   organization, packed deal, packed jury, pattern, patterning, peace,
   physique, picnic, pie, piece of cake, piecing together, pipe, plan,
   planning, planning function, plotting, prearrangement,
   preconcertedness, premeditation, preordering, procedure,
   production, program, program of action, proportion, pushover,
   put-up job, putting together, quiet, quietude, rationalization,
   regularity, rigged jury, routine, schedule, schema, schematism,
   schematization, scheme, scheme of arrangement, scheming, shape,
   shaping, sinecure, sitting duck, snap, stacked deck,
   strategic plan, strategy, structure, structuring, symmetry,
   syneresis, synthesis, system, systematization, tactical plan,
   tactics, tectonics, texture, the big picture, the picture, tissue,
   tranquillity, uniformity, velvet, warp and woof, way, weave, web,
   working plan