13 entries under strong topic. ×

30
unbreakable(adjective, tough, firm, rigid)
22
permanent(adjective, tough, sturdy, constant)
16
everlasting(adjective, stable, constant, unable)
15
durable(adjective, tough, stable, sturdy)
14
lasting(adjective, tough, stable, sturdy)
8
invulnerable(adjective, permanent, invulnerable, untouchable)
8
perdurable(adjective, tough, stable, constant)
7
incorruptible(adjective, honest, moral, honorable)
6
hard(adjective, firm, rigid, unyielding)
4
firm(adjective, tough, sturdy, permanent)
4
indissoluble(adjective, stability, unable, lasting)
0
resilient(adjective, tough, sturdy, permanent)
0
shatterproof(adjective, permanent)
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APASmart Define. (2015). indestructible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/indestructible/thesaurus/synonyms
ChicagoSmart Define. 2015. "indestructible thesaurus" https://smartdefine.org/indestructible/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, indestructible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/indestructible/thesaurus/synonyms>.
MLASmart Define. "indestructible thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/indestructible/thesaurus/synonyms>