Jigger and Thingummy

Jigger noun - An interesting and often novel device with a practical use.

Thingummy and jigger are semantically related. In some cases you can use "Thingummy" instead a noun "Jigger".

Thingummy noun - A small article the actual name of which one either does not know or cannot remember.

Jigger and thingummy are semantically related. Sometimes you can use "Jigger" instead a noun "Thingummy".