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mirror – window – screen – book
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cat – dog – rabbit – hamster
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echo – shadow – mirror – whisper
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whale – dolphin – shark – octopus
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owl – bat – parrot – eagle
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feather – paper – leaf – glass
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pencil – crayon – marker – eraser
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ruby – sapphire – diamond – marble
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lemon – lime – orange – watermelon
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moon – comet – asteroid – satellite
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stairs – ramp – escalator – slide
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whisper – murmur – yell – sigh
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chef – scientist – artist – pilot
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mountain – river – forest – desert
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mountain – island – valley – canyon
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volcano – earthquake – hurricane – thunder
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