Fluctuating
Fluctuating adjective - Likely to change frequently, suddenly, or unexpectedly.
Undulating and fluctuating are semantically related. In some cases you can use "Undulating" instead an adjective "Fluctuating".
Undulating
Fluctuating and undulating are semantically related. Sometimes you can use "Fluctuating" instead an adjective "Undulating".
Mutual synonyms
Cite this Source
Undulating and Fluctuating. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/fluctuating/undulating
Fluctuating & Undulating. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/fluctuating/undulating>.
Undulating or Fluctuating. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/fluctuating/undulating.
Google Ngram Viewer shows how "fluctuating" and "undulating" have occurred on timeline