Certain
Certain adjective - Known but not named.
Valid and certain are semantically related in established topic. In some cases you can use "Valid" instead an adjective "Certain".
Valid
Valid adjective - Based on sound reasoning or information.
Usage example: only further investigation will show whether your theory is valid
Certain and valid are semantically related in established topic. Sometimes you can use "Certain" instead an adjective "Valid".
Nearby Words: validity, validation
Mutual synonyms
Both words in one sentence
- Thus we know for certain that the statement "All fish are aquatic creatures, but not all aquatic creatures are fish." is sound, valid, and true.
Source: Sound, Valid, True - The wedding ceremony may have no bearing on the legal status of the marriage, although in certain jurisdictions the parties do have to take certain specific oaths for a marriage to be valid.
Source: Wedding Deadline - The main difference is that consequentialist theories (like, but not limited to, utilitarism) see consequences as a valid moral reason to actually carry out a certain action or not instead of a reason for a claim being true or false.
Source: Appeal to Consequences
Cite this Source
Valid and Certain. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certain/valid
Certain & Valid. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certain/valid>.
Valid or Certain. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certain/valid.
Google Ngram Viewer shows how "certain" and "valid" have occurred on timeline