19 milestone synonyms include Landmark, Achievement, Benchmark, Turning point, Significant event, Target, Goal, Marker, Breakthrough, and Accomplishment. Milestone is a noun, and its antonyms are setback and triviality. Here are some additional synonyms for "milestone" with example sentences.
19 other ways to say milestone.
Graduation was a major milestone achieved.
Reaching that goal was a significant milestone.
They celebrated their milestone anniversary happily.