Base
Improper
Improper adjective - Not appropriate for a particular occasion or situation.
Base and improper are semantically related. Sometimes you can use "Base" instead an adjective "Improper".
Nearby Word: improperly
Mutual synonyms
Both words in one sentence
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The base's existence was still considered a secret until it was sued over deaths from improper disposal of toxic waste, at which point the jig was basically up.
Source: Open Secret - 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 - There's a Broken Base amongst Standard Poodle owners though, as the smaller Toy and Miniature versions have been known to have more behavioral problems (possibly due to improper breeding due to their popularity).
Source: Dog Stereotype
Cite this Source
Improper and Base. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/base/improper
Base & Improper. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/base/improper>.
Improper or Base. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/base/improper.
Google Ngram Viewer shows how "base" and "improper" have occurred on timeline