59 entries under difficult topic. ×

19
arduous(adjective, hard, tough, severe)
15
laborious(adjective, hard, tough, severe)
12
backbreaking(adjective, hard, tough, severe)
10
heavy(adjective, hard, tough, severe)
9
toilsome(adjective, hard, tough, severe)
8
tiring(verb, adjective, hard, tough, severe)
7
trying(verb, adjective, hard, tough)
7
fatiguing(adjective, hard, tough, severe)
7
painful(adjective, hard, tough, severe)
7
severe(adjective, hard, tough, harsh)
6
hard(adjective, severe, harsh, heavy)
6
exhausting(adjective, hard, tough, severe)
6
strenuous(adjective, hard, tough, severe)
5
effortful(adjective, hard, tough, awkward)
5
tough(adjective, hard, problematic, trying)
5
bothersome(adjective, tough, awkward, grim)
5
irksome(adjective, severe, harsh, heavy)
5
onerous(adjective, hard, tough, heavy)
5
wearing(adjective, awkward, demanding, trying)
4
operose(adjective, hard, tough, awkward)
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APASmart Define. (2015). grueling thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/grueling/thesaurus/synonyms
ChicagoSmart Define. 2015. "grueling thesaurus" https://smartdefine.org/grueling/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, grueling thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/grueling/thesaurus/synonyms>.
MLASmart Define. "grueling thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/grueling/thesaurus/synonyms>