Certain and Tester

Opposite meaning words

Certain adjective - Known but not named.

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Tester is an antonym for certain.

Nearby Words: certainty, certainly

Tester noun - Someone who administers a test to determine your qualifications.

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Certain is an antonym for tester in topics: contingent, conditional.

Nearby Words: test, testing, tested, testable

Cite this Source

Tester and Certain. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/certain/tester

Certain & Tester. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/certain/tester>.

Tester or Certain. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/certain/tester.

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