54 entries under problematical topic. ×

1
mean(adjective, hard, rough, difficult, heavy)
1
murder(adjective, great, tough, rough, difficult)
1
rugged(adjective, hard, tough, rough, difficult)
1
serious(adjective, hard, tough, severe, rough)
1
sticky(adjective, tough, rough, difficult, heavy)
1
terrible(adjective, tough, rough, difficult, heavy)
1
toilful(adjective, tough, rough, difficult, heavy)
1
tricky(adjective, difficult, complex, awkward, demanding)
1
unsparing(adjective, tough, rough, difficult, harsh)
0
awkward(adjective, difficult, complex, demanding, complicated)
0
merciless(adjective, tough, rough, difficult, heavy)
0
scabrous(adjective, tough, rough, difficult, heavy)
0
slavish(adjective, tough, rough, difficult, heavy)
0
uphill battle(expression, adjective, tough, rough, difficult)
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APASmart Define. (2015). effortful thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/effortful/thesaurus/synonyms
ChicagoSmart Define. 2015. "effortful thesaurus" https://smartdefine.org/effortful/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, effortful thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/effortful/thesaurus/synonyms>.
MLASmart Define. "effortful thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/effortful/thesaurus/synonyms>