gismo

Noun	1.	gismo - something whose name is either forgotten or not known Synonyms: dohickey, dojigger, doodad, doohickey, gimmick, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingumajig, thingummy, hickey
	2.	gismo - a device that is very useful for a particular job Synonyms: appliance, contraption, contrivance, gadget, widget, gizmo, convenience

dohickey, dojigger, doodad, doohickey, gimmick, gizmo, gubbins, hickey, stuff, sundries, sundry, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingumajig, thingummy, whatchamacallit, whatsis