Proper
Proper adjective - Following the established traditions of refined society and good taste.
Reasonable is a synonym for proper in regular topic. In some cases you can use "Reasonable" instead an adjective "Proper".
Reasonable
Reasonable adjective - According to the rules of logic.
Proper is a synonym for reasonable in regular topic. Sometimes you can use "Proper" instead an adjective "Reasonable", if it concerns topics such as appropriate, moderate, within reason.
Mutual synonyms
Related pairs
Both words in one sentence
- Instead of a proper, reasonable heir, she ended up with a screaming, brain-damaged, mentally challenged sourpuss with a pathological obsession with sending people to the dungeon.
Source: Gone Horribly Wrong -
Lacking proper authorization or a reasonable excuse for what he is doing in this town, he is quickly arrested and thrown into the military prison until the head scientist comes to visit.
Source: Visual Novel / Muv-Luv Unlimited - In the year leading up to the show's proper start, she had undergone a massive attitude shift and is very reasonable and personable, however.
Source: Rich Bitch
Cite this Source
Reasonable and Proper. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/proper/reasonable
Proper & Reasonable. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/proper/reasonable>.
Reasonable or Proper. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/proper/reasonable.
Google Ngram Viewer shows how "proper" and "reasonable" have occurred on timeline