Difference between Doohickey and Thingamabob

DOOHICKEY vs THINGAMABOB: NOUN

A thing (used in a vague way to refer to something whose name one cannot recall)
Any object, usually a tool or other device, whose name is forgotten, or not known.
Something, especially a small device or part, whose name is unknown or forgotten.
Something whose name is either forgotten or not known

Thingy, Gismo, Thingumajig, Thingmabob, Thingmajig, Thingumabob, Dojigger, Dohickey, Thingummy, Gimmick, Gubbins, Gizmo, Thingamabob, Thingamajig, Doodad

Thingy, Whatsit, Thingummy, Thingumajig, Thingumabob, Thingmajig, Thingmabob, Dojigger, Dohickey, Gimmick, Gizmo, Gubbins, Doodad, Thingamajig, Doohickey

Recharger, Dongle, Adjustable spanner, Kludge, Device, Faff, Keychain, Dingus, Gewgaw, Gadget, Thingy, Gismo, Gimmick, Gizmo, Doodad

Smartie, Whatchamacallits, Whizbang, Faff, Tesla coil, Kludge, Wetware, Technobabble, Dingus, Gewgaw, Thingy, Gimmick, Gizmo, Doodad, Doohickey

Something catches his eyes, and he looks at his feet: the red devil doohickey is sitting on the bars of the cell.
DooHCLUB-06 Harvest (from Early Bird DooHickey vol 6) The product is already in the wishlist.
Doohickey train and there is now much furore over whether the Studebaker unit is any good.
Mexican food doohickey now, Taco Bell locations will let you pick it up Saturday afternoon, two entire days early.
PERRY: So I wrote to him in prison and he sent me this devil doohickey.
Shockwave uses a doohickey to zap his spark into the Allspark and corrupt it.
Anonymous Bulletin: In brief: What about the doohickey?