When it comes to expressing disappointment, there are plenty of synonyms that you can use to avoid sounding repetitive. Some common alternatives to "reiterate disappointment" include restate disappointment, emphasize frustration, accentuate letdown, highlight regret, underscore discouragement, and reaffirm grievance. Each of these phrases adds a slightly different emphasis to the emotion being expressed, so it's worth considering which one will best convey your feelings in a given situation. Whether you're disappointed by a missed opportunity, a broken promise, or a general lack of progress, using one of these synonyms can help you articulate your disappointment in a fresh and impactful way.