Free float time refers to the amount of time a task can be delayed without impacting the project's deadline. There are several synonyms for this term, including slack time, buffer time, and cushion time. These synonyms indicate that there is extra time available within the project schedule to adjust for unexpected events or delays. Free float time is an important concept in project management, as it allows project managers to adjust their plans and resources accordingly. By understanding the nuances of free float time and its synonyms, project managers can better mitigate risks and ensure the timely completion of their projects.