WordNet sense 1 (an angular or rounded shape made by folding):

bend, crimp, flexure, fold, plication

WordNet sense 2 (a slight depression in the smoothness of a surface):

crinkle, furrow, line, seam, wrinkle

WordNet sense 3 (a Malayan dagger with a wavy blade):

creese, kris

WordNet sense 4 (make wrinkles or creases into a smooth surface):

crisp, scrunch, ruckle, scrunch up

WordNet sense 5 (scrape gently):

graze, rake

WordNet sense 6 (become wrinkled or crumpled or creased):

crumple, rumple