Tectonic and Unknown
Opposite meaning words
Tectonic
Tectonic adjective - Having great meaning or lasting effect.
Usage example: a tectonic shift in societal trends occurred in the 1960s
Nearby Word: tectonics
Unknown
Unknown adjective - Happening or existing without one's knowledge.
Nearby Words: unknowable, unknowing
Cite this Source
Unknown and Tectonic. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/tectonic/unknown
Tectonic & Unknown. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/tectonic/unknown>.
Unknown or Tectonic. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/tectonic/unknown.
Google Ngram Viewer shows how "tectonic" and "unknown" have occurred on timeline