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Pronunciation varies by accent · noun
(meteorology) A large, dark cloud, usually a cumulonimbus, charged with electricity and producing thunder and lightning..
the ominous thunderclouds of war
Use thundercloud when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Thundercloud means (meteorology) A large, dark cloud, usually a cumulonimbus, charged with electricity and producing thunder and lightning..
Common synonyms include storm cloud, cumulonimbus, cumulonimbus cloud.
The opposite depends on the specific sense.
the ominous thunderclouds of war
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