20 entries under severe topic. ×

32
tough(adjective, hard, rough, difficult)
30
hard(adjective, tough, rough, difficult)
29
laborious(adjective, hard, rough, difficult)
28
arduous(adjective, hard, tough, rough)
27
trying(verb, adjective, hard, tough)
21
grievous(adjective, hard, difficult, complex)
19
demanding(adjective, hard, tough, rough)
13
exacting(adjective, hard, tough, rough)
9
troublesome(adjective, hard, tough, difficult)
7
tiring(adjective, hard, difficult, harsh)
5
exhausting(adjective, hard, difficult, heavy)
5
fatiguing(adjective, hard, tough, difficult)
3
formidable(adjective, hard, tough, rough)
3
grueling(adjective, hard, difficult, harsh)
3
uphill(adjective, hard, rough, difficult)
2
stiff(adjective, hard, difficult, harsh)
1
crushing(difficult, harsh, heavy, painful)
1
testing(adjective, tough, difficult, violent)
1
tiresome(adjective, hard, harsh, heavy)
0
unforgiving(adjective, violent, demanding, exacting)
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APASmart Define. (2015). taxing thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/taxing/thesaurus/synonyms
ChicagoSmart Define. 2015. "taxing thesaurus" https://smartdefine.org/taxing/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, taxing thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/taxing/thesaurus/synonyms>.
MLASmart Define. "taxing thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/taxing/thesaurus/synonyms>