[1] : WordNet (r) 2.0

gadget
     n : a device that is very useful for a particular job syn: appliance,
          contraption, contrivance, convenience, gizmo, gismo,
          widget
see also:
appliance contraption contrivance convenience gizmo gismo 
widget 

[2] : Moby Thesaurus II by Grady Ward, 1.0

59 moby thesaurus words for "gadget":
   affair, apparatus, appliance, article, artifact, business, concern,
   contraption, contrivance, creation, device, dingus, dofunny,
   dohickey, dojigger, dojiggy, domajig, domajigger, doodad, dowhacky,
   eppes, etwas, flumadiddle, gigamaree, gimcrack, gimmick, gizmo,
   hand tool, hickey, hootenanny, hootmalalie, implement, instrument,
   invention, jigger, machine, material thing, means,
   mechanical device, mechanism, object, power tool, precision tool,
   quelque chose, something, speed tool, thing, thingum, thingumabob,
   thingumadad, thingumadoodle, thingumajig, thingumajigger,
   thingumaree, thingummy, tool, utensil, whatchy, widget

Gadget >> G Words
Gadget, definition of term: Gadget
gadget_pag1.html