Formal
Formal adjective - Following or agreeing with established form, custom, or rules.
Unflexible and formal are semantically related In some cases you can use "Unflexible" instead an adjective "Formal".
Unflexible
Formal and unflexible are semantically related in rigid topic. Sometimes you can use "Formal" instead an adjective "Unflexible".
Mutual synonyms
Cite this Source
Unflexible and Formal. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/formal/unflexible
Formal & Unflexible. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/formal/unflexible>.
Unflexible or Formal. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/formal/unflexible.
Google Ngram Viewer shows how "formal" and "unflexible" have occurred on timeline