58 entries under difficult topic. ×

21
taxing(adjective, hard, severe, complex)
21
trying(adjective, hard, complex, painful)
20
backbreaking(adjective, hard, complex)
20
laborious(adjective, hard, complex)
20
sensitive(adjective, hard, complex, painful)
19
profound(adjective, hard, complex)
19
punishing(adjective, hard, complex)
19
rugged(adjective, hard, tough, severe)
18
ambitious(adjective, hard, complex)
18
drudgery(noun, adjective, hard, complex)
18
heavyweight(adjective, hard, complex)
18
messy(adjective, hard, unpleasant, complex)
18
stressful(adjective, hard, complex)
18
stubborn(adjective, hard, tough, harsh)
18
toilsome(adjective, hard, complex)
18
troubled(adjective, hard, complex)
11
troublesome(adjective, hard, tough, severe, rough)
9
wicked(adjective, unpleasant, awful, terrible)
8
intolerable(adjective, hard, tough, severe, rough)
8
onerous(adjective, hard, severe, harsh)
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APASmart Define. (2016). grievous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/grievous/thesaurus/synonyms
ChicagoSmart Define. 2016. "grievous thesaurus" https://smartdefine.org/grievous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, grievous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/grievous/thesaurus/synonyms>.
MLASmart Define. "grievous thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/grievous/thesaurus/synonyms>