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apex, peak, vertex, acme, top | the highest point (of something) | |
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top, crest, peak, crown, tip, summit, apex, acme | the top or extreme point of something (usually a mountain or hill) | |
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height, top, peak, elevation, pinnacle, superlative, summit, meridian, tiptop, acme | the highest level or degree attainable; the highest stage of development |