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56 entries under serious topic. ×

1
steady(adjective, intense, deliberate, determined, thoughtful)
1
strong-minded(adjective, determined, resolute, persistent)
1
strong-willed(adjective, intense, deliberate, determined)
1
tenacious(adjective, intense, deliberate, determined)
1
unfaltering(adjective, intense, deliberate, determined)
1
unflinching(adjective, resolute, persistent, unwavering)
1
unhesitating(adjective, resolute, persistent, unwavering)
1
unwavering(adjective, intense, deliberate, determined)
1
weighty(adjective, thoughtful, sober, sincere)
0
deep(adjective, sober, solemn)
0
grave(adjective, thoughtful, sober, sincere)
0
hard as nails(expression, adjective, idiom, determined)
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no-nonsense(adjective, thoughtful, sober, sincere)
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sincere(adjective, thoughtful, sober, solemn)
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sober(adjective, thoughtful, sincere, solemn)
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thoughtful(adjective, sober, sincere, somber)
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APASmart Define. (2015). mean business thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/mean_business/thesaurus/synonyms
ChicagoSmart Define. 2015. "mean business thesaurus" https://smartdefine.org/mean_business/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, mean business thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/mean_business/thesaurus/synonyms>.
MLASmart Define. "mean business thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/mean_business/thesaurus/synonyms>