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/ˌmɛɡətsuːˈnɑːmi/ · noun
(oceanography) An extremely large tsunami-like wave caused by an avalanche or landslide displacing large amounts of water very quickly..
Use megatsunami when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Megatsunami means (oceanography) An extremely large tsunami-like wave caused by an avalanche or landslide displacing large amounts of water very quickly..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use megatsunami where its definition matches the intended context.
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