Kitchen appliance and Microwave oven

Kitchen appliance noun - A home appliance used in preparing food.

Microwave oven and kitchen appliance are semantically related. In some cases you can replace phrase "Microwave oven" with "Kitchen appliance", this phrases are similar.

Microwave oven 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.

Kitchen appliance and microwave oven are semantically related. Sometimes you can use "Kitchen appliance" instead a noun phrase "Microwave oven".