3
endangered(delicate, uncertain, sensitive, unsound, tricky)
3
exposed(adjective, adverb, bad, open, shaky)
3
fraught with danger(expression, adjective, idiom, delicate, uncertain)
3
hard(adjective, adverse)
3
injurious(adjective, harmful, dangerous, detrimental)
3
life-threatening(adjective, dangerous)
3
mischievous(adjective, wicked, devilish)
3
nice
3
problematic(adjective, difficult, delicate, uncertain, awkward)
3
rugged(adjective, delicate, uncertain, unstable, doubtful)
3
susceptible
3
tight(adjective, difficult, troublesome)
2
adverse(adjective, adverse)
2
bad
2
breakneck
2
catastrophic(adjective, adverse)
2
danger(noun, fear)
2
dire
2
endanger
2
fatal(adjective, dangerous)
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APASmart Define. (2015). perilous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/perilous/thesaurus/synonyms
ChicagoSmart Define. 2015. "perilous thesaurus" https://smartdefine.org/perilous/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, perilous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/perilous/thesaurus/synonyms>.
MLASmart Define. "perilous thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/perilous/thesaurus/synonyms>