95 entries under difficult topic. ×

6
stiff(adjective, set, hard, tough, severe)
5
complex(adjective, severe)
5
stormy(adjective, calm, severe)
5
trying(adjective, dull, tough, severe, rough)
5
unfathomable(adjective, hard)
4
demanding(adjective, dull, tough, severe, rough)
4
exacting(adjective, dull, tough, severe, rough)
4
exhausting(adjective, dull, awkward, boring)
4
irksome(adjective, dull, awkward, boring)
4
sticky(adjective, rough, informal, awkward)
4
terrible(adjective, bad, great, tough, severe)
4
vexatious(adjective, dull, severe, boring)
4
wearying(adjective, dull, awkward, boring)
3
complicated(adjective, tough, severe, obscure, rough)
3
confused(adjective, severe, intense, gloomy)
3
turbulent(adjective, calm, strong, severe)
3
uphill(adjective, tough, severe, rough)
2
active(adjective, strong, sound, tough)
2
boisterous(adjective, strong, severe, rough)
2
bothersome(adjective, tough, severe, rough)
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APASmart Define. (2016). heavy thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, heavy thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>.
MLASmart Define. "heavy thesaurus" 25 January 2016. Web. 23 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms>