A cumulonimbus is a thunderstorm that is composed of a high amount of cumulus clouds. These clouds are usually very large, and they can be seen from a long way away.
The cumulonimbus was so big that it was visible from the airport.
The cumulonimbus is a sign that a storm is coming.
noun
a dark cloud of great vertical extent charged with electricity; associated with thunderstorms
Synonyms:
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A cumulonimbus incus is a sub form of cumulonimbus capillatus.
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Or just a little cumulonimbus...
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This is a powerful cumulonimbus cloud.
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All are related to cumulonimbus clouds.
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The cumulonimbus cloud is a weather symbol.
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The cumulonimbus is the cloud responsible for thunderstorms.
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The Cumulonimbus cloud is the basic foundation of a thundercloud.
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Often formed from the anvil of cumulonimbus storms.
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Or one great big one for clouds turning into a Cumulonimbus.