Certain
Certain adjective - Known but not named.
Express is a synonym for certain in determined topic. In some cases you can use "Express" instead an adjective "Certain", when it comes to topics like referring to a specifically known amount.
Express
Express adjective - So clearly expressed as to leave no doubt about the meaning.
Usage example: students are not allowed to leave the grounds during school hours unless they have express permission from the principal's office
Certain is a synonym for express in specific topic. Sometimes you can use "Certain" instead an adjective "Express", if it concerns topics such as explicit.
Mutual synonyms
Related pairs
Both words in one sentence
- Sa Ga Frontier and its sequel subvert this trope by making only specific vendors for the express purpose of selling items (and only certain ones, at that).
Source: We Buy Anything - Other characters express amazement that Calvin can do all these things by (or to) himself, even when it's very clear he needs help at certain points in his adventures.
Source: Not-So-Imaginary Friend - Spouses trapped in an Awful Wedded Life often express anti-marriage sentiments similar to those of certain types of Confirmed Bachelor.
Source: Confirmed Bachelor
Cite this Source
Express and Certain. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/certain/express
Certain & Express. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/certain/express>.
Express or Certain. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/certain/express.
Google Ngram Viewer shows how "certain" and "express" have occurred on timeline