Less
Less adjective - Having not so great importance or rank as another.
Unless
Both words in one sentence
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Earn Your Happy Ending: In the second game, you can't get the good endings unless you complete the game with less than 3 saves, within a time limit, and using 2 or less first aid kits.
Source: Video Game / One Night -
Left without someone to wind her, the tiny clockwork faerie has less than five hours to live — unless she can find someone to trust.
Source: Comic Book / Vögelein - It translates as "ghost" or "spirit," but people/things named Ghost tend to be far less threatening... unless of course you've built up your tech tree.
Cite this Source
Unless and Less. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/less/unless
Less & Unless. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/less/unless>.
Unless or Less. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/less/unless.
Google Ngram Viewer shows how "less" and "unless" have occurred on timeline