Invariable
Invariable adjective - Not capable of changing or being changed.
Regular is a synonym for invariable in quality topic. In some cases you can use "Regular" instead an adjective "Invariable", when it comes to topics like same, characterisitc, constant, unvaried.
Regular
Regular adjective - Appearing or occurring repeatedly from time to time.
Invariable is a synonym for regular in quality topic. You can use "Invariable" instead an adjective "Regular", if it concerns topics such as same, characterisitc, orderly, unvaried.
Mutual synonyms
Cite this Source
Regular and Invariable. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/invariable/regular
Invariable & Regular. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/invariable/regular>.
Regular or Invariable. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/invariable/regular.
Google Ngram Viewer shows how "invariable" and "regular" have occurred on timeline