GIZMO

appliance, contraption, contrivance, convenience, gadget, gizmo, gismo, widget

(noun) a device or control that is very useful for a particular job

doodad, doohickey, doojigger, gimmick, gizmo, gismo, gubbins, thingamabob, thingumabob, thingmabob, thingamajig, thingumajig, thingmajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget

(noun) something unspecified whose name is either forgotten or not known; “she eased the ball-shaped doodad back into its socket”; “there may be some great new gizmo around the corner that you will want to use”

Source: WordNet® 3.1

Etymology

Noun

gizmo (plural gizmos)

(slang) Something, generally a device, for which one does not know the proper term.

Synonyms: gadget, whatchamacallit, thingamajig

Synonyms

• See also thingy

Source: Wiktionary