Key
Key adjective - Coming before all others in importance.
Most important and key are semantically related. In some cases you can use "Most important" instead an adjective "Key".
Most important
Key and most important are semantically related. Sometimes you can use "Key" instead an adjective phrase "Most important".
Mutual synonyms
Related pairs
Both terms in one sentence
- Hawke of Dragon Age II rose to prominence and played a key role in one of the most important events in Thedas's history almost totally unintentionally.
Source: Right Man in the Wrong Place - And then it turns out that it was all a Secret Test of Character for the most important McGuffin of the series, and a key for it besides.
Source: Situational Sword -
Meaningful Name: Kee ("key" meaning the most important thing, or the thing that opens a previously locked door).
Source: Film / Children of Men
Cite this Source
Most important and Key. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/key/most_important
Key & Most important. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/key/most_important>.
Most important or Key. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/key/most_important.
Google Ngram Viewer shows how "key" and "most important" have occurred on timeline