3
hair-raising(adjective, awful, terrible, horrible, afraid)
3
heinous(adjective, awful, terrible, horrible, afraid)
3
hellish(adjective, awful, terrible, horrible, afraid)
3
horrible(adjective, awful, terrible, afraid)
3
howling(adjective, awful, terrible, horrible, afraid)
3
immane(adjective, awful, terrible, horrible, afraid)
3
laboured
3
monstrous(adjective, awful, terrible, horrible, afraid)
3
morbid(adjective, awful, terrible, horrible, afraid)
3
mortal(adjective, awful, terrible, horrible, afraid)
3
nasty(adjective, awful, terrible, horrible, afraid)
3
perishing(adjective, awful, terrible, horrible, afraid)
3
scarey(adjective, awful, terrible, horrible, afraid)
3
shocking(adjective, awful, terrible, horrible, afraid)
3
smarting(adjective, painful)
3
sore(adjective, painful)
3
splitting(adjective, awful, terrible, horrible, afraid)
3
stabbing(adjective, painful)
3
stinging(adjective, painful)
3
terrifying(adjective, awful, terrible, horrible, afraid)
11 years ago|12k views|share |citing 
APASmart Define. (2015). grueling thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/grueling/thesaurus/synonyms
ChicagoSmart Define. 2015. "grueling thesaurus" https://smartdefine.org/grueling/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, grueling thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/grueling/thesaurus/synonyms>.
MLASmart Define. "grueling thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/grueling/thesaurus/synonyms>