252 entries under tough topic. ×

11
powerful(adjective, person, body, strong, sound)
10
difficult(adjective, dull, hard, severe)
10
grueling(adjective, hard, severe, difficult)
10
impenetrable(adjective, set, hard, solid)
10
labored(adjective, severe, difficult, awkward)
10
substantial(adjective, give, strong, hard, great)
9
concentrated(adjective, set, strong, hard)
9
operose(adjective, severe, rough, difficult)
9
rough(noun, adjective, calm, strong, hard)
9
solid(adjective, person, set, body, strong)
9
sound(adjective, strong, hard, solid)
9
tiresome(adjective, dull, flat, difficult)
9
toilsome(adjective, severe, difficult, harsh)
9
troublesome(adjective, severe, difficult, harsh)
8
distressing(adjective, severe, rough, difficult)
8
gladiator(opponent, champion, mercenary, militant)
7
close(adjective, set, strong, hard)
7
compact(adjective, set, strong, hard)
7
effortful(adjective, severe, difficult, harsh)
7
firm(noun, adjective, set, strong, hard)
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APASmart Define. (2016). heavy thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, heavy thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>.
MLASmart Define. "heavy thesaurus" 25 January 2016. Web. 28 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms>