The term "back nine" is most commonly associated with golf, referring to the final nine holes of an 18-hole course. However, there are many synonyms that can be used to describe this same portion of the course. Some alternatives include the "second nine," the "closing stretch," the "home stretch," or simply the "final nine." Other options might include "the finisher," "the grand finale," or "the stretch run." Whatever the chosen synonym, the back nine marks a critical turning point in a round of golf, and can often be the most challenging and exciting section of the course.