3
uncertain(adjective, clear, sure, insecure, irresponsible)
3
unhealthy
3
venturesome
2
harmful(adjective, good, insecure, harmless, irresponsible)
2
unprotected(adjective, secure, insecure, irresponsible)
2
precarious(adjective, strong, stable)
2
chancy(adjective, risky, dangerous)
2
hurt
2
incautious(adjective, insecure, irresponsible)
2
insecure(adjective, strong, steady, dangerous, irresponsible)
2
poisonous(adjective, insecure, irresponsible)
2
reckless
2
unreliable(adjective, insecure, irresponsible)
2
unsound(adjective, strong, sound, well, flimsy)
2
adventurous
2
deadly
2
deleterious
2
dicey(adjective, risky)
2
dodgy
2
endangered
10 years ago|6.3k views|share |citing 
APASmart Define. (2016). safe thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/safe/thesaurus/antonyms
ChicagoSmart Define. 2016. "safe thesaurus" https://smartdefine.org/safe/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, safe thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/safe/thesaurus/antonyms>.
MLASmart Define. "safe thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/safe/thesaurus/antonyms>