Unscheduled and Unplanned

Unscheduled

Unscheduled adjective - Not scheduled or not on a regular schedule.

Unplanned and unscheduled are semantically related. In some cases you can use "Unplanned" instead an adjective "Unscheduled".

Unplanned

Unplanned adjective - Happening by chance.

Unscheduled and unplanned are semantically related. You can use "Unscheduled" instead an adjective "Unplanned".
Cite this Source
Unplanned and Unscheduled. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/unscheduled/unplanned
Unscheduled & Unplanned. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/unscheduled/unplanned>.
Unplanned or Unscheduled. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/unscheduled/unplanned.
Google Ngram Viewer shows how "unscheduled" and "unplanned" have occurred on timeline