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: I 'climbed' Sandia Peak outside Albuquerque. Which is really piddling as far as mountains go. It's a mere 9,000 feet and some change, and what I went up was a path on one of the gentler slopes. It's about seven miles to the summit, and I walked it with my husband, son, and brother-in-law. For me that was a tremendous accomplishment.
Acme
Part of speech: noun
Definition: The top or highest point; pinnacle; culmination.The crisis or height of a disease.Mature age; full bloom of life. - Ben Jonson