Water vapor, sleet, cloudy showers, which one is not?

Water vapor. Water vapor is produced by water evaporation, and sleet, cloudy days and showers are weather changes caused by the passing of cold fronts in the weather system, which are caused by the meeting of air masses with different properties, so water vapor is not a category. Sleet and cloudy showers are weather-related words, such words include: cloudy, cloudy to sunny, light rain, heavy rain, smog, light snow, blizzard and so on.