Summit
Part of speech: noun
Definition: a peak; the top of a mountain a gathering or assembly of leaders
Part of speech: verb
Definition: To reach the summit of a mountain.
Example sentence: My father blamed me for my brother Gunther's death, for not bringing him home. He died in an avalanche as we descended from the summit of Nanga Parbat, one of the 14 peaks over 8,000m, in 1970. Gunther and I did so much together. It was difficult for my father to understand what it was like up there.
Pinnacle
Part of speech: noun
Definition: The highest point.A tall, sharp and craggy rock or mountain.An all-time high; a point of greatest achievement or success
Part of speech: verb
Definition: to put something on a pinnacle
Example sentence: George Orwell is a pinnacle writer, for his combination of moral insight and literary writing.