Circuit board and Integrated circuit

Circuit board noun - A printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities.

Integrated circuit and circuit board are semantically related. In some cases you can use "Integrated circuit" instead a noun phrase "Circuit board".

Integrated circuit noun - A microelectronic computer circuit incorporated into a chip or semiconductor; a whole system rather than a single component.

Circuit board and integrated circuit are semantically related. You can use "Circuit board" instead a noun phrase "Integrated circuit".