doohickey
Noun
Meaning
something unspecified whose name is either forgotten or not known
Source: WordNetSynonyms
gizmo
gimmick
gubbins
gismo
doodad
thingamajig
thingummy
thingamabob
thingumabob
thingumajig
thingmajig
whatchamacallit
thingmabob
hickey
machine
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Antonyms
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Examples
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
Why Does “Doohickey” Mean a Gadget?