A temporary substitute for a bed, as one made on the floor or on chairs; -- perhaps originally from the shaking down of straw for this purpose. Sir W. Scott. [1913 Webster]

shakedown, n.
1 a makeshift bed.
2 US sl. a swindle; a piece of extortion.
3 (attrib.) US colloq. denoting a voyage, flight, etc., to test a new ship or aircraft and its crew.

N  stealing, theft, thievery, latrociny, direption, abstraction, appropriation, plagiary, plagiarism, autoplagiarism, latrocinium, spoliation, plunder, pillage, sack, sackage, rapine, brigandage, foray, razzia, rape, depredation, raid, blackmail, piracy, privateering, buccaneering, license to plunder, letters of marque, letters of mark and reprisal, filibustering, filibusterism, burglary, housebreaking, badger game, robbery, highway robbery, hold-up, mugging, peculation, embezzlement, fraud, larceny, petty larceny, grand larceny, shoplifting, thievishness, rapacity, kleptomania, Alsatia, den of Cacus, den of thieves, blackmail, extortion, shakedown, Black Hand, thief, thieving, thievish, light-fingered, furacious, furtive, piratical, predaceous, predal, predatory, predatorial, raptorial, stolen, sic vos non vobis.

N  support, ground, foundation, base, basis, terra firma, bearing, fulcrum, bait, caudex crib, point d'appui, pou sto, purchase footing, hold, locus standi, landing place, landing stage, stage, platform, block, rest, resting place, groundwork, substratum, riprap, sustentation, subvention, floor, supporter, aid, prop, stand, anvil, fulciment, cue rest, jigger, monkey, stay, shore, skid, rib, truss, bandage, sleeper, stirrup, stilts, shoe, sole, heel, splint, lap, bar, rod, boom, sprit, outrigger, ratlings, staff, stick, crutch, alpenstock, baton, staddle, bourdon, cowlstaff, lathi, mahlstick, post, pillar, shaft, thill, column, pilaster, pediment, pedicle, pedestal, plinth, shank, leg, socle, zocle, buttress, jamb, mullion, abutment, baluster, banister, stanchion, balustrade, headstone, upright, door post, jamb, door jamb, frame, framework, scaffold, skeleton, beam, rafter, girder, lintel, joist, travis, trave, corner stone, summer, transom, rung, round, step, sill, angle rafter, hip rafter, cantilever, modillion, crown post, king post, vertebra, columella, backbone, keystone, axle, axletree, axis, arch, mainstay, trunnion, pivot, rowlock, peg, tiebeam, thole pin, board, ledge, shelf, hob, bracket, trevet, trivet, arbor, rack, mantel, mantle piece, mantleshelf, slab, console, counter, dresser, flange, corbel, table, trestle, shoulder, perch, horse, easel, desk, clotheshorse, hatrack, retable, teapoy, seat, throne, dais, divan, musnud, chair, bench, form, stool, sofa, settee, stall, arm chair, easy chair, elbow chair, rocking chair, couch, fauteuil, woolsack, ottoman, settle, squab, bench, aparejo, faldstool, horn, long chair, long sleeve chair, morris chair, lamba chauki, lamba kursi, saddle, pannel, pillion, side saddle, pack saddle, pommel, bed, berth, pallet, tester, crib, cot, hammock, shakedown, trucklebed, cradle, litter, stretcher, bedstead, four poster, French bed, bunk, kip, palang, bedding, bichhona, mattress, paillasse, pillow, bolster, mat, rug, cushion, footstool, hassock, tabouret, tripod, monopod, Atlas, Persides, Atlantes, Caryatides, Hercules, supporting, supported, fundamental, dorsigerous, astride on, straddle.