The central building block at the top of an arch or vault.

synonyms: key, keystone.

Roget 215: support, ground, foundation, base, basis; terra firma; bearing, fulcrum, bait [U.S.], caudex crib^†; point d'appui [Fr.], pou sto [Gr.], purchase footing, hold, locus standi [Lat.]; landing place, landing stage; stage, platform; block; rest, resting place; groundwork, substratum, riprap, sustentation, subvention; floor etc. (basement) 211.    supporter; aid etc. 707; 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 etc. (pendency) 214^†; tiebeam etc. (fastening) 45; thole pin^†.    board, ledge, shelf, hob, bracket, trevet^†, trivet, arbor, rack; mantel, mantle piece [Fr.], 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 [Fr.], 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.    ... show more

Dutch: sluitstuk, roos, slotstuk, sluitsteen
Polish: klucz, zwornik

A stone that is used to mark a grave.

synonyms: gravestone, tombstone.

Dutch: zerk, grafsteen
Polish: kamień nagrobny, pomnik, nagrobek