climax

1 : a figure of speech in which a series of phrases or sentences is arranged in ascending order of rhetorical forcefulness
2 a : the highest point : culmination <the climax of a distinguished career> b : the point of highest dramatic tension or a major turning point in the action (as of a play) c : orgasm d : menopause
3 : a relatively stable ecological stage or community especially of plants that is achieved through successful adaptation to an environment; especially : the final stage in ecological succession

— cli·max·less adjective