Concrete
Concrete adjective - Existing in fact and not merely as a possibility.
Usage example: concrete evidence, and not just a theory, must be presented at a trial
Possible
Both words in one sentence
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It's entirely possible to blast out all the concrete around it, leaving it floating in mid-air.
Source: Bullethole Door -
So Cassie is hurrying back to base as silently as possible when she sees a baby carriage about to fall down a flight of concrete stairs.
Source: Baby Carriage -
While that's certainly possible (it is, after all, an abandoned military base), it's also likely that the concrete was just old.
Cite this Source
Possible and Concrete. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/concrete/possible
Concrete & Possible. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/concrete/possible>.
Possible or Concrete. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/concrete/possible.
Google Ngram Viewer shows how "concrete" and "possible" have occurred on timeline