In under
Within
Within noun - An interior or internal part.
Mutual synonyms
Both terms in one sentence
-
Once within a few hours, once within a week, and the last two times in under two months each.
Source: Cardboard Prison -
The first place horse often finishes in under 12 hours, but every year about half of the horses do not finish within the 24 hours allowed.
Source: Automaton Horses - In Under the Knife 2, you have two Pemptis to deal with at the same time (though with the right strategy, you'll kill both within moments of each other and save you some trouble).
Cite this Source
Within and In under. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/in_under/within
In under & Within. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/in_under/within>.
Within or In under. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/in_under/within.
Google Ngram Viewer shows how "in under" and "within" have occurred on timeline