Approximate
Approximate adjective - Being such only when compared to something else.
Unknown and approximate are semantically related. In some cases you can use "Unknown" instead an adjective "Approximate".
Unknown
Unknown adjective - Happening or existing without one's knowledge.
Approximate and unknown are semantically related. Sometimes you can use "Approximate" instead an adjective "Unknown".
Nearby Words: unknowable, unknowing
Mutual synonyms
Both words in one sentence
- Approximate year that, for unknown reasons, two Space Marine Legions are stricken from all records.
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Exact wealth unknown, but it's enough to purchase a couple hundred zeppelins—or their approximate worth in pudding.
Source: Fiction 500 - Two are confirmed to be able to hold it for three minutes although it's implied this is the approximate time limit for all the Visoreds with the exception of Mashiro who can hold her mask for 15 hours and for unknown reasons has always been able to do so.
Source: Hour of Power
Cite this Source
Unknown and Approximate. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/approximate/unknown
Approximate & Unknown. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/approximate/unknown>.
Unknown or Approximate. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/approximate/unknown.
Google Ngram Viewer shows how "approximate" and "unknown" have occurred on timeline