27 entries under severe topic. ×

19
arduous(adjective, hard, tough, difficult)
15
laborious(adjective, hard, tough, difficult)
12
backbreaking(adjective, hard, tough, difficult)
10
heavy(adjective, hard, tough, difficult)
9
toilsome(adjective, hard, tough, difficult)
8
tiring(verb, adjective, hard, tough)
7
fatiguing(adjective, hard, tough, difficult)
7
painful(adjective, hard, tough, difficult)
6
hard(adjective, difficult, harsh, heavy)
6
exhausting(adjective, hard, tough, difficult)
6
strenuous(adjective, hard, tough, difficult)
5
difficult(adjective, hard, tough, harsh)
5
irksome(adjective, difficult, harsh, heavy)
4
burdensome(adjective, hard, tough, difficult)
4
troublesome(adjective, hard, tough, difficult)
2
demanding(adjective, hard, tough, difficult)
2
exacting(adjective, tough, difficult, harsh)
2
grinding(adjective, difficult, harsh, heavy)
2
taxing(adjective, hard, difficult, harsh)
1
tiresome(tough, harsh, heavy, painful)
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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>