A Gantt chart is a tool used in project management to visually represent the timeline of a project's tasks and milestones. However, there are various synonyms for Gantt chart that can also be used to describe this tool, such as project timeline, task bar chart, milestone chart, progress chart, and project schedule chart. Each of these terms highlights a specific aspect of the Gantt chart. While project timeline emphasizes the chronological order of the tasks, task bar chart emphasizes the breakdown of tasks, and milestone chart emphasizes the significant events within the project. Whether it's called a Gantt chart or any of its synonyms, this tool remains an essential part of efficient project management.