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Pronunciation varies by accent · noun
The belief in, or advocacy for, the theory that the planet Earth is flat..
Use flat-earthism when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Flat-earthism means The belief in, or advocacy for, the theory that the planet Earth is flat..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use flat-earthism where its definition matches the intended context.
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