252 entries under tough topic. ×

1
obdurate(adjective, strong, hard, severe)
1
obstreperous(strong, piercing, problematic, strident)
1
paramount(order, quality, superior, important)
1
person-at-arms(opponent, champion, mercenary, militant)
1
primo(order, quality, superior, prime)
1
problem(severe, painful, problematic, trying)
1
problematic(severe, painful, trying, disorderly)
1
prohibitive(severe, painful, problematic, trying)
1
pugilist(opponent, champion, mercenary, militant)
1
punching bag(expression, opponent, champion, mercenary)
1
refractory(hard, solid, rigid, inflexible)
1
reinforced(adjective, strong, sound, solid)
1
relentless(adjective, strong, hard, severe)
1
rigid(adjective, strong, hard, severe)
1
secure(adjective, strong, hard, sound)
1
serviceperson(opponent, champion, mercenary, militant)
1
sinewy(adjective, strong, sound, solid)
1
slugger(opponent, champion, mercenary, militant)
1
soldier(opponent, champion, thug, mercenary)
1
solidified(adjective, set, hard, solid)
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APASmart Define. (2016). heavy thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, heavy thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>.
MLASmart Define. "heavy thesaurus" 25 January 2016. Web. 29 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms>