Which of these phrases is similar in meaning to "the zenith of a career"?

"The zenith of a career" refers to the peak or the highest point of achievement in someone's professional journey. This phrase captures the essence of reaching a pinnacle of success and is often associated with accomplishments, recognition, and the culmination of efforts over time.

When considering the meaning of "zenith," it is clear that it embodies the idea of utmost success and fulfillment in a career. Thus, the phrase "the highest achievement of a career" aligns perfectly with this understanding, as it emphasizes the idea of having reached a significant milestone or level of excellence in one's professional endeavors.

The other phrases do not convey the same sense of peak achievement. Starting a career implies an initial phase, while a turning point indicates a moment of change, not necessarily success. Similarly, the end of a career suggests a conclusion rather than a culmination of achievements. Therefore, the option referring to the highest achievement accurately captures the meaning of the zenith in this context.