15
insecure(adjective, uncertain, worried, dangerous, precarious)
12
vulnerable(adjective, strong, open)
10
unprotected(adjective, weak, soft, unreliable)
9
cause death
7
unsafe(adjective, strong, weak, soft, unreliable)
6
unfasten(verb, close, disregard, fail, detach)
5
uncertain(adjective, clear, weak, soft, doubtful)
5
dangerous(adjective, hazardous, troubling)
5
lose
4
hazardous(adjective, strong, safe, unpredictable, dangerous)
4
dismiss(verb, accept, remove, responsibility, begin)
4
dubious(adjective, clear, honest)
4
feeble(adjective, weak, soft, unreliable)
4
unguarded
4
unsound(adjective, strong, weak, sound, soft)
4
unsure(adjective, clear, weak, soft, certain)
3
hurt(verb, disregard, fail, loosen, unfix)
3
precarious(adjective, strong, stable)
3
shaky(adjective, strong, sound)
3
endanger(verb, disregard, fail, loosen, unfix)
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APASmart Define. (2015). secure thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/secure/thesaurus/antonyms
ChicagoSmart Define. 2015. "secure thesaurus" https://smartdefine.org/secure/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, secure thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/secure/thesaurus/antonyms>.
MLASmart Define. "secure thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/secure/thesaurus/antonyms>