32 entries under complex topic. ×

31
laborious(adjective, hard, difficult, heavy)
27
arduous(adjective, hard, difficult, heavy)
27
hard(adjective, difficult, heavy, awkward)
27
punishing(adjective, hard, difficult, strenuous)
26
toilsome(adjective, hard, difficult, awkward)
26
operose(adjective, hard, difficult, awkward)
24
oppressive(adjective, hard, difficult, heavy)
24
tough(adjective, hard, difficult, heavy)
22
burdensome(adjective, hard, difficult, heavy, cruel)
22
severe(adjective, hard, difficult, heavy, cruel)
22
taxing(adjective, hard, difficult, heavy)
22
weighty(adjective, hard, difficult, heavy)
21
difficult(adjective, hard, heavy, awkward)
21
rough(adjective, hard, difficult, heavy)
21
trying(adjective, hard, difficult, heavy)
19
complicated(adjective, hard, difficult, awkward)
19
grievous(adjective, hard, difficult)
19
grinding(adjective, hard, difficult, cruel)
19
hefty(adjective, hard, difficult)
19
intricate(adjective, hard, difficult, awkward)
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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>