87 entries under dreadful topic. ×

65
hazardous(adjective, severe, difficult, delicate, awful)
48
risky(noun, adjective, adverb, open, severe)
39
perilous(adjective, adverb, open, severe, difficult)
30
harmful(adjective, bad, severe, offensive, awful)
22
serious(adjective, help, bad, great, severe)
22
threatening(adjective, strong, hard, tough, severe)
21
chancy(noun, adjective, adverb, open, severe)
19
treacherous(adjective, hard, severe, evil, rough)
19
grave(adjective, help, great, tough, severe)
17
menacing(adjective, strong, tough, severe, intense)
16
severe(adjective, help, bad, hard, tough)
13
nasty(adjective, bad, hard, rough, offensive)
12
ugly(adjective, bad, hard, tough, severe)
12
unhealthy(adjective, severe, delicate, awful, terrible)
10
wicked(adjective, severe, harsh, delicate, unpleasant)
9
injurious(adjective, bad, severe, offensive, awful)
9
grievous(adjective, help, great, tough, severe)
9
ominous(adjective, unpleasant, heavy, cruel, horrible)
7
evil(adjective, bad, hard, rough, nasty)
7
forbidding(adjective, harsh, dark, unpleasant, gloomy)
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APASmart Define. (2016). dangerous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/dangerous/thesaurus/synonyms
ChicagoSmart Define. 2016. "dangerous thesaurus" https://smartdefine.org/dangerous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, dangerous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dangerous/thesaurus/synonyms>.
MLASmart Define. "dangerous thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/dangerous/thesaurus/synonyms>