Immovable
Immovable adjective - Incapable of moving or being moved.
Ironclad and immovable are semantically related. In some cases you can use "Ironclad" instead an adjective "Immovable".
Nearby Words: immovability, immovably
Ironclad
Ironclad adjective - Inflexibly entrenched and unchangeable.
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Synonyms for Ironclad
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Ironclad and Immovable. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/immovable/ironclad
Immovable & Ironclad. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/immovable/ironclad>.
Ironclad or Immovable. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/immovable/ironclad.
Google Ngram Viewer shows how "immovable" and "ironclad" have occurred on timeline