3
hair raising(adjective, awful, terrible, horrible, afraid)
3
hellish(adjective, awful, terrible, horrible, afraid)
3
helluva(adjective, awful, terrible, horrible, afraid)
3
ill-fated(adjective, person, feelings)
3
immane(adjective, awful, terrible, horrible, afraid)
3
loathsome(adjective, awful, terrible, foul, disgusting)
3
looming(adjective, threatening)
3
miserable(adjective, awful, terrible, horrible, afraid)
3
mortal(adjective, awful, terrible, horrible, afraid)
3
painful(adjective, hard, severe, offensive, upsetting)
3
panicking(verb, alarming)
3
parlous(adjective, awful, terrible, horrible, afraid)
3
perishing(adjective, awful, terrible, horrible, afraid)
3
scarey(adjective, awful, terrible, horrible, afraid)
3
spine-tingling(horrible, shocking, ghastly, breathtaking, grisly)
3
splitting(adjective, awful, terrible, horrible, afraid)
3
stupefying(adjective, awful, wonderful, amazing, grand)
3
terrific
3
towering(adjective, awful, terrible, horrible, afraid)
3
tragic(adjective, awful, terrible, horrible, afraid)
10 years ago|13k views|share |citing 
APASmart Define. (2016). frightening thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/frightening/thesaurus/synonyms
ChicagoSmart Define. 2016. "frightening thesaurus" https://smartdefine.org/frightening/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, frightening thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/frightening/thesaurus/synonyms>.
MLASmart Define. "frightening thesaurus" 23 March 2016. Web. 26 September 2026. <https://smartdefine.org/frightening/thesaurus/synonyms>