Proper
Proper adjective - Meeting the requirements of a purpose or situation.
Usage example: you'll need to have a proper diet if you want to lose weight
Suitable is a synonym for proper in appropriate topic. In some cases you can use "Suitable" instead an adjective "Proper", when it comes to topics like characteristic, nice, customary, right. popular alternative
Suitable
Suitable adjective - Meeting the requirements of a purpose or situation.
Usage example: I don't have anything suitable to wear to a bar mitzvah
Proper is a synonym for suitable in appropriate topic. You can use "Proper" instead the word "Suitable" as an adjective or a noun, if it concerns topics such as characteristic, nice, customary, right. popular alternative
Mutual synonyms
Both words in one sentence
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Proper planning can let you end the mission quickly by bringing a motorcycle with you (though the free-run course may not be suitable for it) or by shooting the thief when you have a clear shot.
Source: Video Game / Sleeping Dogs -
Komiyoji takes over his body, we never see Saburo/Hakkaider again for the rest of the series, and was never given a suitable defeat as once he returns he is then immediately killed by Gill and thus never got a proper final fight with Kikaider.
Source: Series / Kikaider -
Told to give up on his love for Emma, he proposes (under duress, it has to be said) to a more "suitable" Proper Lady, Eleanor.
Source: Your Cheating Heart
Cite this Source
Suitable and Proper. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/proper/suitable
Proper & Suitable. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/proper/suitable>.
Suitable or Proper. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/proper/suitable.
Google Ngram Viewer shows how "proper" and "suitable" have occurred on timeline