Coherent and Invalid

Coherent

Coherent adjective - According to the rules of logic.
Usage example: a coherent blueprint to hooking up a home theater system with a minimum of fuss

Invalid is an antonym for coherent.

Invalid

Invalid adjective - Chronically or repeatedly suffering from poor health.

Coherent is an antonym for invalid.

Cite this Source
Invalid and Coherent. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/coherent/invalid
Coherent & Invalid. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/coherent/invalid>.
Invalid or Coherent. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/coherent/invalid.
Google Ngram Viewer shows how "coherent" and "invalid" have occurred on timeline