1) Dohickey 2) Dojigger 3) Doodad 4) Doohickey 5) Etcetera 6) Gimmick 7) Gismo 8) Gizmo 9) Gubbins 10) Noun 11) Sundries 12) Thingamabob 13) Thingamajig 14) Thingamabob 15) Thingamajig 16) Thingumabob 17) Thingumajig 18) Thingummy 19) Whatsis 
[candy] Whatchamacallit is a candy bar marketed in the United States by The Hershey Company. This candy bar was first introduced in 1978. The `Whatchamacallit` name was devised by Patricia Volk, the writer of STUFFED: Adventures of a Restaurant Family when she was the Associate Creative Director at Doyle Dane & Bernbach and was in charge of...
Whatchamacallit is slang for something whose name escapes one.
[n] - miscellaneous unspecified artifacts