Fall behind
Fall behind verb - Hang (back) or fall (behind) in movement, progress, development, etc..
Idle and fall behind are semantically related. In some cases you can use "Idle" instead a verb "Fall behind".
Idle
Idle verb - To spend time doing nothing.
Fall behind and idle are semantically related. Sometimes you can use "Fall behind" instead a verb "Idle".
Cite this Source
Idle and Fall behind. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/fall_behind/idle
Fall behind & Idle. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/fall_behind/idle>.
Idle or Fall behind. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/fall_behind/idle.
Google Ngram Viewer shows how "fall behind" and "idle" have occurred on timeline