35 entries under detrimental topic. ×

50
dangerous(adjective, adverb, open, severe, difficult)
39
risky(adjective, adverb, open, severe, delicate)
36
hazardous(adjective, severe, difficult, delicate, awful)
21
chancy(adjective, adverb, open, severe, delicate)
9
unhealthy(adjective, severe, delicate, awful, terrible)
8
wicked(adjective, severe, delicate, informal, awful)
6
jeopardous(adjective, delicate, uncertain, sensitive, capable)
5
harmful(adjective, risky, dangerous, injurious, unsafe)
5
unsound(adjective, severe, delicate, awful, terrible)
3
baneful(warning, harmful, threatening, injurious)
3
damaging(adjective, harmful, dangerous, injurious)
3
injurious(adjective, harmful, dangerous)
2
noxious(adjective, harmful, dangerous, injurious)
2
poisonous(adjective, harmful, dangerous, injurious)
1
negative(harmful, injurious)
1
unhealthful(harmful, injurious)
1
unhygienic(harmful, injurious)
1
unsanitary(harmful, injurious)
1
villainous(harmful, injurious)
1
virulent(harmful, injurious)
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APASmart Define. (2015). perilous thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/perilous/thesaurus/synonyms
ChicagoSmart Define. 2015. "perilous thesaurus" https://smartdefine.org/perilous/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, perilous thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/perilous/thesaurus/synonyms>.
MLASmart Define. "perilous thesaurus" 17 July 2015. Web. 1 October 2026. <https://smartdefine.org/perilous/thesaurus/synonyms>