54 entries under problematical topic. ×

31
laborious(adjective, hard, difficult, heavy, complex)
27
arduous(adjective, hard, difficult, heavy, complex)
27
hard(adjective, difficult, heavy, complex, awkward)
26
toilsome(adjective, hard, difficult, complex, awkward)
26
operose(adjective, hard, difficult, complex, awkward)
22
burdensome(adjective, hard, difficult, heavy, cruel)
22
severe(adjective, hard, difficult, heavy, cruel)
21
difficult(adjective, hard, heavy, complex, awkward)
21
rough(adjective, hard, difficult, heavy, complex)
19
complicated(adjective, hard, difficult, complex, awkward)
19
grinding(adjective, hard, difficult, cruel, complex)
19
intricate(adjective, hard, difficult, complex, awkward)
19
involved(adjective, hard, difficult, complex, awkward)
19
knotty(adjective, hard, difficult, complex, awkward)
19
rugged(adjective, hard, difficult, complex, awkward)
19
serious(adjective, hard, difficult, complex, awkward)
19
sticky(adjective, hard, difficult, complex, awkward)
19
toilful(adjective, hard, difficult, complex, awkward)
18
tricky(adjective, hard, difficult, complex, awkward)
10
grueling(adjective, hard, tough, severe, difficult)
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APASmart Define. (2015). backbreaking thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/backbreaking/thesaurus/synonyms
ChicagoSmart Define. 2015. "backbreaking thesaurus" https://smartdefine.org/backbreaking/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, backbreaking thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/backbreaking/thesaurus/synonyms>.
MLASmart Define. "backbreaking thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/backbreaking/thesaurus/synonyms>