Doorknocker and Device

Doorknocker noun - A device (usually metal and ornamental) attached by a hinge to a door.

Device and doorknocker are semantically related. In some cases you can use "Device" instead a noun "Doorknocker".

Device noun - A clever often underhanded means to achieve an end.

Doorknocker and device are semantically related. Sometimes you can replace term "Doorknocker" with "Device", this nouns are similar.