Gadget and Mod con

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

Mod con and gadget are semantically related. in widget topic. In some cases you can use "Mod con" instead a noun "Gadget". informal substitute

Mod con noun - Modern convenience; the appliances and conveniences characteristic of a modern house.

Gadget and mod con are semantically related. You can use "Gadget" instead a noun phrase "Mod con".