Thingummy and Things

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

Things and thingummy are semantically related. In some cases you can replace term "Things" with "Thingummy", this nouns are similar.

Things noun - Any movable possession (especially articles of clothing).

Thingummy and things are semantically related. Sometimes you can use "Thingummy" instead a noun "Things".