Certain and Outside

Opposite meaning words

Certain adjective - Known but not named.

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Outside is an antonym for certain.

Nearby Words: certainty, certainly

Outside adjective - Situated on the outside or farther out.

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Certain is an antonym for outside in topics: slight, external.

Nearby Word: outsider

Sugar Bowl: The land of Oz under Princess Ozma, despite periodic threats from outside and certain parts of Oz of being way out there, generally follows this trope.

Source: Literature / Land of Oz
Also note that it's not always certain what caused a movie to get (or not get) a certain rating, as outside of a few guidelines, the MPAA ratings are a black box.

Source: Avoid the Dreaded G Rating
Each game has certain cities and localities you can only reach once you have taught one of your Pokémon a certain HM and once you have the Gym badge that allows you to use it outside of battle.

Source: Ability Required to Proceed

Cite this Source

Outside and Certain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/certain/outside

Certain & Outside. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/certain/outside>.

Outside or Certain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/certain/outside.

Google Ngram Viewer shows how "certain" and "outside" have occurred on timeline