Sound
Sound adjective - According to the rules of logic.
Usage example: sound reasoning alone should tell you that the result is invalid
Sustainable and sound are semantically related. In some cases you can use "Sustainable" instead an adjective "Sound".
Sustainable
Sustainable adjective - Capable of being defended with good reasoning against verbal attack.
Sound and sustainable are semantically related. Sometimes you can use "Sound" instead an adjective "Sustainable".
Mutual synonyms
Cite this Source
Sustainable and Sound. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/sound/sustainable
Sound & Sustainable. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/sound/sustainable>.
Sustainable or Sound. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/sound/sustainable.
Google Ngram Viewer shows how "sound" and "sustainable" have occurred on timeline