Proper
Mutual synonyms
Both words in one sentence
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Inverted entirely in Max Payne, when most people missed the oodles of valid and proper Norse symbolism.
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Scribblenauts features George Washington and Abraham Lincoln as summonable characters, despite its statement that proper names are not valid words.
Source: Historical Hilarity -
On the other hand, a mistyped word, proper noun, or even valid English word that isn't part of the dictionary (for whatever reason) can get "corrected" to something utterly preposterous, especially if the spell checker is set to "autocorrect".
Source: Rouge Angles of Satin
Cite this Source
Valid and Proper. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/proper/valid
Proper & Valid. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/proper/valid>.
Valid or Proper. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/proper/valid.
Google Ngram Viewer shows how "proper" and "valid" have occurred on timeline