Widget and Whatsit

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

Whatsit and widget are semantically related. In some cases you can use "Whatsit" instead a noun "Widget".

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

Widget and whatsit are semantically related. Sometimes you can use "Widget" instead a noun "Whatsit".