Synonyms to dead-sure thing

cinch, affix, afford proof of, anchor, annex, ascertain, assure, attach, babe, back band, backstrap, band, bandage, bearing rein, belay, bellyband, belt, bend, bind, bind up, bit, blinders, blinds, boob, brace, breeching, breeze, bridle, bring home to, bundle, caparison, cavesson, cement, certify, chain, checkrein, cheekpiece, chinband, chump, clamp, clear up, clinch, collar, cramp, credulous person, crownband, crupper, cull, curb, decide, demonstrate, determine, dismiss all doubt, do up, dupe, easy mark, easy pickings, easy target, easy thing, engraft, ensure, establish, fall guy, fasten, find out, fish, fix, follow, follow from, fool, gag swivel, get at, gird, girdle, girt, girth, gobe-mouches, graft, grapple, greener, greenhorn, greeny, gudgeon, gull, hackamore, halter, hames, hametugs, harness, have a case, headgear, headstall, hip straps, hold good, hold water, horn, innocent, insure, jaquima, jerk line, jockey, knit, lace, lash, lead-pipe cinch, leadpipe cinch, leash, lines, make certain, make fast, make good, make no doubt, make no mistake, make out, make sure, make sure of, martingale, monkey, moor, na