Microwave and Radio wave

Microwave noun - Kitchen appliance that cooks food by passing an electromagnetic wave through it; heat results from the absorption of energy by the water molecules in the food.

Radio wave and microwave are semantically related In some cases you can replace phrase "Radio wave" with "Microwave", this terms are similar.

Radio wave noun - An electromagnetic wave with a wavelength between 0.5 cm to 30,000 m.

Microwave and radio wave are semantically related in electromagnetic wave topic. You can use "Microwave" instead a noun phrase "Radio wave".