Illogical
Illogical adjective - Not using or following good reasoning.
Usage example: illogical people are likely to believe every sensational claim made on TV
Unreasonable is a synonym for illogical in irrational topic. In some cases you can use "Unreasonable" instead an adjective "Illogical", when it comes to topics like reason, not making sense. popular alternative
Nearby Word: illogicality
Unreasonable
Unreasonable adjective - Having no basis in reason or fact.
Usage example: an unreasonable assumption
Illogical is a synonym for unreasonable in reason topic. You can use "Illogical" instead an adjective "Unreasonable", if it concerns topics such as irrational, unacceptable, not logical or sensible. popular alternative
Mutual synonyms
Related pairs
- stupid and illogical
- stupid and unreasonable
- inconsistent and illogical
- inconsistent and unreasonable
- foolish and illogical
- foolish and unreasonable
- irrational and illogical
- irrational and unreasonable
- invalid and illogical
- invalid and unreasonable
- unsound and illogical
- unsound and unreasonable
- silly and illogical
- silly and unreasonable
Both words in one sentence
- Part of why the fans loved him is that nothing he did was unreasonable or illogical.
Source: Temporary Scrappy -
Circumstances of the deal notwithstanding (and Mike tries to explain why they were unreasonable and illogical), the payment was decidedly short.
Source: Series / Suits -
People are illogical, unreasonable, and self-centered.
Source: Knight in Sour Armor
Cite this Source
Unreasonable and Illogical. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/illogical/unreasonable
Illogical & Unreasonable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/illogical/unreasonable>.
Unreasonable or Illogical. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/illogical/unreasonable.
Google Ngram Viewer shows how "illogical" and "unreasonable" have occurred on timeline