Sound
Sound adjective - According to the rules of logic.
Usage example: sound reasoning alone should tell you that the result is invalid
Valid is a synonym for sound in sensible topic. In some cases you can use "Valid" instead an adjective "Sound", when it comes to topics like quality, good, logical, accepted. popular alternative
Valid
Valid adjective - According to the rules of logic.
Usage example: your argument isn't valid because you're taking what should be the conclusion and using it as a premise
Sound is a synonym for valid in characteristic topic. You can use "Sound" instead an adjective "Valid", if it concerns topics such as property, good, right, well founded. popular alternative
Nearby Words: validity, validation
Mutual synonyms
Both words in one sentence
- An argument can be given the complete round of and could be true, valid or sound as detailed on the other page.
Source: Fact Opinion Argument - In logic, "sound", "valid", and "true" are not synonymous.
Source: Sound, Valid, True - 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
Cite this Source
Valid and Sound. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/sound/valid
Sound & Valid. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/sound/valid>.
Valid or Sound. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/sound/valid.
Google Ngram Viewer shows how "sound" and "valid" have occurred on timeline