Common
Improper
Improper adjective - Not appropriate for a particular occasion or situation.
Common and improper are semantically related. Sometimes you can use "Common" instead an adjective "Improper".
Nearby Word: improperly
Both words in one sentence
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Common versions include feeding an animal something it should never eat, keeping it in improper conditions, or handling it a way that would cause it great distress or even damage.
Source: Artistic License Animal Care - More common are radicals, fractions proper and improper, constants (such as pi or the natural base), and scientific notationnote Though technically, using the wrong exponent here is equivalent to misplacing the decimal point, sometimes over many orders of magnitude.
Source: Misplaced a Decimal Point -
Cerberus uses subterfuge to get their hands on the more-common "hibridium" type (as stygium is specifically noted to be extremely rare), but the whole plan fails as the platform it is mounted on explodes due to improper construction.
Source: Stealth in Space
Cite this Source
Improper and Common. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/common/improper
Common & Improper. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/common/improper>.
Improper or Common. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/common/improper.
Google Ngram Viewer shows how "common" and "improper" have occurred on timeline