136 entries under strong topic. ×

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indomitable(adjective, hard, tough, sturdy)
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insensible(adjective, hard, tough, sturdy)
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intensive(powerful, penetrating)
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protracted(powerful, penetrating)
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severe passionate(expression, powerful, penetrating)
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steel(adjective, hard, tough, sturdy)
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stinking(adjective, sharp, nasty, unpleasant)
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strained(powerful, penetrating)
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sturdy(adjective, hard, tough, rugged)
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supreme(powerful, penetrating)
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thick(adjective, hard, tough, sturdy)
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tough inflexible(expression, hard, tough, sturdy)
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unbending(adjective, hard, tough, harsh)
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undue(powerful, penetrating)
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unyielding(adjective, hard, tough, severe)
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zealous(powerful, penetrating, covetous, envious)
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APASmart Define. (2016). bitter thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/bitter/thesaurus/synonyms
ChicagoSmart Define. 2016. "bitter thesaurus" https://smartdefine.org/bitter/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, bitter thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/bitter/thesaurus/synonyms>.
MLASmart Define. "bitter thesaurus" 22 March 2016. Web. 26 September 2026. <https://smartdefine.org/bitter/thesaurus/synonyms>