10 entries under troublesome topic. ×

22
weighty(adjective, hard, difficult, heavy, complex)
21
difficult(adjective, hard, heavy, complex, awkward)
6
onerous(adjective, hard, difficult, heavy, cruel)
4
demanding(adjective, hard, difficult, harsh, heavy)
4
exacting(adjective, hard, difficult, harsh, heavy)
2
crushing(adjective, severe, difficult, harsh, heavy)
1
exigent(adjective, severe, difficult, harsh, heavy)
1
superincumbent(difficult, cruel, domineering, tyrannical)
0
worrisome
0
worrying
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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>