48 entries under difficult topic. ×

19
operose(adjective, hard, complex)
19
sad(adjective, hard, complex)
18
cruel(adjective, hard, complex)
18
dire(adjective, hard, complex)
18
unbearable(adjective, hard, complex)
13
exacting(adjective, hard, tough, severe, rough)
11
onerous(adjective, hard, harsh, heavy)
11
strenuous
9
troublesome(adjective, hard, tough, severe)
8
exigent(adjective, hard, harsh, heavy)
7
tiring(adjective, hard, severe, harsh)
5
exhausting(adjective, hard, severe, heavy)
5
fatiguing(adjective, hard, tough, severe)
4
draining(verb, adjective, demanding, strenuous)
4
wearing(adjective, hard, tough, heavy)
3
formidable(adjective, hard, tough, severe, rough)
3
grueling(adjective, hard, severe, harsh)
3
harsh(adjective, hard, rough, cruel)
3
uphill(adjective, hard, severe, rough)
3
worrisome(adjective, irritating, troublesome, disorderly)
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APASmart Define. (2015). taxing thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/taxing/thesaurus/synonyms
ChicagoSmart Define. 2015. "taxing thesaurus" https://smartdefine.org/taxing/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, taxing thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/taxing/thesaurus/synonyms>.
MLASmart Define. "taxing thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/taxing/thesaurus/synonyms>