| Gadget |
| Thingy |
| Widget |
| Doodad |
| Doohickey |
| Thingumbob |
| Contraption |
| Thingamajig |
| Thingamabob |
| Doodad: Var. |
| Gadget: Var. |
| Useful gadget |
| Whatchamacallit? |
| Doohickey (Var.) |
| Thingamajig (Var.) |
| Thingamabob (Var.) |
| Device with no name |
| Whatchamacallit: Var. |
| Thingamajig's other spelling |
| Useful (but unspecified) device |