Fluid
Fluid adjective - Likely to change frequently, suddenly, or unexpectedly.
Usage example: his arrival plans are fluid, so expect him anytime
Nearby Word: fluidity
Lasting
Lasting adjective - Having an existence or validity that does not change or diminish.
Both words in one sentence
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Season Fluidity: so far, the series is more on the fluid side of the scale, with only a small number of episodes having a lasting impact on the continuity (Lincoln getting into a relationship with Ronnie Anne being the most prominent example).
Cite this Source
Lasting and Fluid. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/fluid/lasting
Fluid & Lasting. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/fluid/lasting>.
Lasting or Fluid. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/fluid/lasting.
Google Ngram Viewer shows how "fluid" and "lasting" have occurred on timeline