35
unbreakable(adjective, strong, tough)
30
strong
21
firm(adjective, strong)
15
durable(adjective, strong, weak, sturdy)
14
sturdy
12
tough(adjective, strong, sturdy)
9
robust(adjective, weak, small)
9
indestructible
8
stout
6
powerful
6
vigorous(adjective, dull, weak, feeble)
4
lusty
3
red
3
significant
3
able(adjective, strong)
3
stubby
3
substantial
2
good
2
salubrious
2
all-conquering
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APASmart Define. (2015). fragile thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fragile/thesaurus/antonyms
ChicagoSmart Define. 2015. "fragile thesaurus" https://smartdefine.org/fragile/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2015, fragile thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fragile/thesaurus/antonyms>.
MLASmart Define. "fragile thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/fragile/thesaurus/antonyms>