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56 entries under serious topic. ×

1
obstinate(adjective, intense, deliberate, cruel, determined)
1
on ice(expression, adjective, resolute, persistent)
1
pat(adjective, resolute, persistent, unwavering)
1
persevering(adjective, resolute, persistent, unwavering)
1
persistent(adjective, intense, deliberate, determined)
1
playing hard ball(expression, adjective, idiom, intense, deliberate)
1
purposeful(adjective, determined, resolute, persistent)
1
resolute(adjective, intense, deliberate, determined, thoughtful)
1
resolved(adjective, thoughtful, sober, resolute)
1
sedate(adjective, thoughtful, sober, sincere)
1
set(adjective, resolute, persistent, unwavering)
1
set on(expression, adjective, resolute, persistent)
1
settled(adjective, intense, deliberate, determined)
1
single-minded(adjective, intense, deliberate, cruel, determined)
1
solemn(adjective, thoughtful, sober, sincere)
1
solid(adjective, resolute, persistent, pat)
1
somber(adjective, thoughtful, sober, sincere)
1
stable(adjective, thoughtful, sober, sincere)
1
staid(adjective, thoughtful, sober, sincere)
1
steadfast(adjective, intense, deliberate, determined)
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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>