54 entries under problematical topic. ×

34
exacting(adjective, dull, hard, tough, easy)
30
difficult(adjective, dull, hard, tough, severe)
22
hard(adjective, dull, tough, easy, severe)
22
severe(adjective, hard, tough, easy, severe)
19
rigorous(adjective, hard, severe, rough, difficult)
14
burdensome(adjective, dull, hard, tough, severe)
13
arduous(adjective, dull, hard, tough, severe)
11
laborious(adjective, dull, hard, tough, severe)
11
strenuous(adjective, dull, hard, tough, severe)
11
onerous(adjective, dull, hard, tough, severe)
11
troublesome(adjective, hard, tough, severe, difficult)
8
bothersome(adjective, hard, tough, severe, difficult)
8
toilsome(adjective, hard, tough, severe, difficult)
7
challenging(verb, adjective, hard, tough, severe)
7
rough(adjective, hard, tough, severe, difficult)
7
rugged(adjective, hard, tough, severe, rough)
6
formidable(adjective, tough, severe, rough, difficult)
6
unsparing(adjective, tough, rough, difficult, harsh)
5
knotty(adjective, hard, tough, severe, rough)
5
tricky(adjective, tough, difficult, awkward, painful)
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APASmart Define. (2015). demanding thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/demanding/thesaurus/synonyms
ChicagoSmart Define. 2015. "demanding thesaurus" https://smartdefine.org/demanding/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, demanding thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/demanding/thesaurus/synonyms>.
MLASmart Define. "demanding thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/demanding/thesaurus/synonyms>