Irrational
Irrational adjective - Not using or following good reasoning.
Obsessive and irrational are semantically related. In some cases you can use "Obsessive" instead an adjective "Irrational".
Nearby Words: irrationality, irrationally
Obsessive
Obsessive adjective - Caused by or suggestive of an irresistible urge.
Irrational and obsessive are semantically related. Sometimes you can use "Irrational" instead an adjective "Obsessive".
Mutual synonyms
Both words in one sentence
- Boss also tended to act in a very dumb, irrational and even obsessive way when he was in presence of Sayaka or Jun Hono.
Source: Love Makes You Crazy - By the time the Department of Temporal Investigations have their own series, the Department in general and Lucsly in particular are portrayed as having an obsessive bordering on irrational hatred of Kirk, regarding him as the worst temporal criminal ever and comparing him to Adolf Hitler.
Source: Character Exaggeration
Cite this Source
Obsessive and Irrational. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/irrational/obsessive
Irrational & Obsessive. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/irrational/obsessive>.
Obsessive or Irrational. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/irrational/obsessive.
Google Ngram Viewer shows how "irrational" and "obsessive" have occurred on timeline