Synonyms|732Antonyms|136|Broader|5Narrower|22Related|976

59 entries under serious topic. ×

1
dangerous(great, severe, important, weighty)
1
determined(adjective, thoughtful, sober, sincere)
1
determining(big, important, significant, substantial)
1
earth-shaking(important, significant, critical, historic)
1
earth-shattering(important, significant, critical, historic)
1
fixed(adjective, thoughtful, sober, sincere)
1
for real(expression, adjective, thoughtful, sober)
1
fundamental(important, substantial, essential, critical)
1
grievous(great, severe, important, weighty)
1
heavyweight(great, big, heavy, important, significant)
1
imperative(big, important, substantial, valuable)
1
indispensable(important, substantial, essential, critical)
1
intense(adjective, sharp, bright, brilliant, rich)
1
intent(adjective, thoughtful, sober, sincere)
1
mean business(expression, adjective, thoughtful, sober)
1
no-fooling(adjective, thoughtful, sober, sincere)
1
no-nonsense(adjective, dull, quiet, severe, big)
1
paramount(important, significant, critical, vital)
1
pivotal(important, significant, critical, historic)
1
playing hard ball(expression, adjective, idiom, tough, severe)
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ChicagoSmart Define. 2016. "meaningful thesaurus" https://smartdefine.org/meaningful/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, meaningful thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/meaningful/thesaurus/synonyms>.
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