THESAURUS
pleat
accordion
pleat, aqueduct, box
pleat, canal, canalization, canalize, carve, chamfer, channel, chisel, corrugate, crack, crease, crimp, crisp, cut, dado, dike, ditch, dog-ear, double, double over, enfold, engrave, entrenchment, flounce, flute, fold, fold over, fosse, frill, furrow, gash, gather, goffer, gouge, groove, gully, gutter, ha-ha, incise, infold, interfold, kennel, knife
pleat, lap over, moat, plait, plat, plicate, plow, ply, quill, rabbet, rifle, ruff, ruffle, rut, score, scratch, slit, streak, striate, sunk fence, trench, trough, tuck, turn over, twill, wrinkle
ROGET THESAURUS
pleat
Fold
N
fold, plicature, plait,
pleat, ply, crease, tuck, gather, flexion, flexure, joint, elbow, double, doubling, duplicature, gather, wrinkle, rimple, crinkle, crankle, crumple, rumple, rivel, ruck, ruffle, dog's ear, corrugation, frounce, flounce, lapel, pucker, crow's feet, plication, folded, fluted, pleated.