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This gTLD is very niche-oriented, so having a one-word .academy is no guarantee that it will be a premium name. For example, something like bacon.academy (please, please, please, don't register this one -- it's just an example) would not make much sense.
The new "g's" are going to experience an uphill battle as it is, so selecting a non-relevant word is just adding another layer of foolishness.
My advice: spend your money wisely, and, perhaps, wait for a gTLD like .web, which may offer more opportunity because of its more broad appeal.
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