Thingummy and Thing

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

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

Thing noun - Something material that can be perceived by the senses.

Thingummy and thing are semantically related in whatsit topic. Sometimes you can use "Thingummy" instead a noun "Thing". informal substitute