Key
Key adjective - Coming before all others in importance.
Usage example: maintains that Sir Isaac Newton remains the key figure in physical science
Least
Least adjective - The superlative of `little' that can be used with mass nouns and is usually preceded by `the'; a quantifier meaning smallest in amount or extent or degree.
Both words in one sentence
-
Good thing at least one keyboard type doesn't have an Insert key just to the right of Backspace (There's also the zero key on the number pad when Num Lock is off).
Source: Damn You, Muscle Memory -
The key to surviving is the number of followers one has on the social network, so long as one has at least one follower; these followers can drop out at any time.
Source: Deadly Game -
In Mailstrom on the ZX Spectrum, the least violent way for the postman protagonist to open pillar boxes is to use a skeleton key.
Source: Skeleton Key
Cite this Source
Least and Key. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/key/least
Key & Least. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/key/least>.
Least or Key. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/key/least.
Google Ngram Viewer shows how "key" and "least" have occurred on timeline