Inflexible and Immutable

Inflexible

Inflexible adjective - Not capable of changing or being changed.
Usage example: the inflexible law of gravity

Immutable is a synonym for inflexible in obstinate topic. In some cases you can use "Immutable" instead an adjective "Inflexible", when it comes to topics like stubborn, stringent, flexible. popular alternative

Immutable

Immutable adjective - Not capable of changing or being changed.
Usage example: one of the immutable laws of television is that low ratings inevitably lead to cancellation

Inflexible is a synonym for immutable in unchangeable topic. You can use "Inflexible" instead an adjective "Immutable", if it concerns topics such as flexible, unchanging. popular alternative

Nearby Word: immutability
Cite this Source
Immutable and Inflexible. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/inflexible/immutable
Inflexible & Immutable. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/inflexible/immutable>.
Immutable or Inflexible. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/inflexible/immutable.
Google Ngram Viewer shows how "inflexible" and "immutable" have occurred on timeline