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Pronunciation varies by accent · noun
(astronomy, rare) The property or state of being hypermassive..
Use hypermassiveness when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Hypermassiveness means (astronomy, rare) The property or state of being hypermassive..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use hypermassiveness where its definition matches the intended context.
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