Magnetometer rhymes with:
densitometer, densitometer, accelerometer, anemometer, densitometer, dynamometer, fluorometer, goniometer, hydrometer, hygrometer, interferometer, kilometer, micrometer, odometer, spectrometer, speedometer, thermometer
densitometer, densitometer, accelerometer, anemometer, densitometer, dynamometer, fluorometer, goniometer, hydrometer, hygrometer, interferometer, kilometer, micrometer, odometer, spectrometer, speedometer, thermometer