beam, billet, board, boarding, clapboard, coat, coating, collop, cord, cordwood, covering, cut, deal, disk, driftwood, feuille, film, firewood, flap, foil, fold, hardwood, lamella, lamina, laminated glass, laminated wood, lap, lath, lathing, lathwork, leaf, log, lumber, membrane, pane, panel, panelboard, paneling, panelwork, patina, peel, pellicle, plait, plank, planking, plate, plating, ply, plyboard, pole, post, puncheon, rasher, safety glass, scum, shake, sheathing, sheathing board, sheet, sheeting, shingle, sideboard, siding, skin, slab, slat, slice, softwood, splat, stave, stick, stick of wood, stovewood, table, tablet, three-by-four, timber, timbering, timberwork, two-by-four, veneer, wafer, weatherboard, wood

For further exploring for "plywood" in Webster Dictionary Online