The Collaborative International Dictionary of English v.0.48:

Fastener \Fas"ten*er\, n.
   One who, or that which, makes fast or firm.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fastener
    n 1: a person who fastens or makes fast; "he found the door
         fastened and wondered who the fastener was"
    2: restraint that attaches to something or holds something in
       place [syn: fastener, fastening, holdfast, fixing]

Moby Thesaurus II by Grady Ward, 1.0:

139 Moby Thesaurus words for "fastener":
   adhesive, affixation, anchor, annexation, attachment, band,
   bandage, bar, barrette, bellyband, belt, bind, binding,
   binding stone, binding twine, bobby pin, bollard, bolt, bond,
   bonder, bondstone, box hook, brace, braces, brad, braid, buckle,
   button, cable, carpet tack, catch, chain, cinch, cincture, clamp,
   clasp, clasping, cleat, click, clinch, clip, clothespin,
   corking pin, cotter, dowel, fastening, fibula, fillet, fishhook,
   funiculus, garter, girding, girdle, girth, grab, grapnel, grappler,
   grappling iron, guy, hairpin, hank, hasp, hawser, haywire, hitch,
   hitching post, holdfast, hook, hook and eye, hooking, inkle,
   interlocker, kevel, kingpin, knot, lace, lacing, lariat, lashing,
   latch, latchet, leader, ligament, ligation, line, lock, loop,
   moorings, nail, noose, nut, padlock, paper clip, pawl, peg, pin,
   pintle, ring, rivet, roller, rope, safety pin, screw, seal, sennit,
   setscrew, skewer, slide fastener, snap, snubbing post, spike,
   splice, staple, sticking, strap, string, strop, stub tenon,
   suspenders, tack, tag, tendon, terret, thole, tholepin, thong,
   thumbtack, tie, tie beam, tieing, toggle, treenail, tug, twine,
   vise, whang, wire, zipper, zipping