Synonyms|71Antonyms|0|Broader|0Narrower|0Related|6
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ferine(aper, demoniac, annihilative)
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ferocious(aper, demoniac, annihilative)
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fierce(aper, demoniac, annihilative)
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inhuman(aper, demoniac, annihilative)
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inhumane(aper, demoniac, annihilative)
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lethiferous(aper, demoniac, annihilative)
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life-and-death
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life-or-death
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life and death(expression, idiom, aper, demoniac, annihilative)
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momentous
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murderous(aper, demoniac, annihilative)
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not a trivial issue
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of great consequence(expression, idiom, aper, demoniac, annihilative)
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of importance
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of moment
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pressing
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pressure
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ravening(aper, demoniac, annihilative)
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sanguinary(aper, demoniac, annihilative)
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sanguineous(aper, demoniac, annihilative)
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APASmart Define. (2015). no laughing matter thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/no_laughing_matter/thesaurus/synonyms
ChicagoSmart Define. 2015. "no laughing matter thesaurus" https://smartdefine.org/no_laughing_matter/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, no laughing matter thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/no_laughing_matter/thesaurus/synonyms>.
MLASmart Define. "no laughing matter thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/no_laughing_matter/thesaurus/synonyms>