What is another word for cumulo-stratus?
Pronunciation: [kjuːmjˈʊlə͡ʊstɹˈatəs] (IPA) 
Cumulo-stratus is a term used to describe a type of cloud formation that appears as a combination of cumulus and stratus clouds. These clouds often have a dark and ominous appearance and are typically associated with thunderstorms and heavy rain. Some synonyms for cumulo-stratus include towering cumulus and thunderstorm clouds. Other descriptors for this cloud formation include storm clouds and thunderheads. Regardless of the terminology used, these clouds should always be taken seriously and avoided when possible as they can lead to dangerous weather conditions such as lightning strikes and strong winds.
