12 entries under permanent topic. ×

14
irrevocable(adjective, change, severe, fixed, stability)
13
immutable(adjective, fixed, even, rigid, inflexible)
11
irreparable(adjective, severe, pessimistic, unable, hopelessness)
9
unalterable(adjective, change, complete, fixed, even)
7
constant(adjective, fixed, even, rigid, inflexible)
6
fixed(adjective, even, rigid, inflexible, consistent)
6
invariable(adjective, fixed, even, rigid, inflexible)
4
lost(adjective, severe, pessimistic, desperate)
4
unchanging(adjective, even, rigid, inflexible, consistent)
1
inflexible(adjective, fixed, normal, even, rigid)
1
rigid(adjective, even, inflexible, reliable, consistent)
1
stable(adjective, fixed, even, rigid, inflexible)
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APASmart Define. (2015). irreversible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/irreversible/thesaurus/synonyms
ChicagoSmart Define. 2015. "irreversible thesaurus" https://smartdefine.org/irreversible/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, irreversible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/irreversible/thesaurus/synonyms>.
MLASmart Define. "irreversible thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/irreversible/thesaurus/synonyms>