Battery: A device that produces electricity to provide power for radios, cars, etc.
Part of speech: noun. All cars use battery
Candle: A stick-shaped piece of wax with a wick ( piece of string) in the middle of it that produces light as it slowly burns:
Part of speech: noun. Shall I light a candle?
Compass: A device for finding direction with a needle that can move easily and that always points to magnetic north
Part of speech: noun. If you get lost follow the compass