Irrational
Irrational adjective - Not using or following good reasoning.
Usage example: it's irrational to think that you can continue to consume an excess of calories and not gain weight
Invalid is a synonym for irrational in illogical topic. In some cases you can use "Invalid" instead an adjective "Irrational".
Nearby Words: irrationality, irrationally
Mutual synonyms
Related pairs
- wrong and irrational
- wrong and invalid
- inconsistent and irrational
- inconsistent and invalid
- implausible and irrational
- implausible and invalid
- illogical and irrational
- illogical and invalid
- unsound and irrational
- unsound and invalid
- senseless and irrational
- senseless and invalid
- absurd and irrational
- absurd and invalid
Cite this Source
Invalid and Irrational. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/irrational/invalid
Irrational & Invalid. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/irrational/invalid>.
Invalid or Irrational. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/irrational/invalid.
Google Ngram Viewer shows how "irrational" and "invalid" have occurred on timeline