In line
In line adjective - Awaiting something; especially something due.
On call
Mutual synonyms
Cite this Source
On call and In line. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/in_line/on_call
In line & On call. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/in_line/on_call>.
On call or In line. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/in_line/on_call.
Google Ngram Viewer shows how "in line" and "on call" have occurred on timeline