88 entries under adverb topic. ×

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indestructibly
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infinitely
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inflexibly(firmly, stably)
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interminably
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lastingly
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like a rock(firmly, stably)
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motionlessly(firmly, stably)
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now and forever
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on and on
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permanently
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perpetually
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resiliently
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rigidly(firmly, stably)
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solid(firmly, stably)
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stockily
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tenaciously
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thoroughly(firmly, stably)
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till Doomsday
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till blue in the face
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till death do us part
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APASmart Define. (2015). sturdily thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/sturdily/thesaurus/synonyms
ChicagoSmart Define. 2015. "sturdily thesaurus" https://smartdefine.org/sturdily/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, sturdily thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/sturdily/thesaurus/synonyms>.
MLASmart Define. "sturdily thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/sturdily/thesaurus/synonyms>