89 entries under significant topic. ×

5
needful(adjective, essential, basic, vital)
5
obligatory(adjective, important, essential, critical)
4
compulsory(adjective, important, essential, critical)
4
dangerous(adjective, bad, severe, serious)
4
paramount(adjective, direct, prompt, big, important)
4
primary(adjective, big, substantial, valuable)
4
requisite(adjective, important, essential, critical)
4
wanted(adjective, essential, basic, vital)
3
chief(adjective, great, big, substantial)
3
foremost(adjective, vital, earnest, insistent)
3
heavy(adjective, tough, severe, informal, big)
3
mandatory(adjective, essential, basic, vital)
3
needed(adjective, important, essential, critical)
3
principal(adjective, great, big, substantial)
3
salient(adjective, big, substantial, valuable)
2
consequential(adjective, clear, heavy, important)
2
decisive(adjective, severe, big, important)
2
hazardous(adjective, bad, heavy, serious)
2
perilous(adjective, bad, heavy, serious)
2
substantial(adjective, big, valuable, vital)
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APASmart Define. (2015). urgent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/urgent/thesaurus/synonyms
ChicagoSmart Define. 2015. "urgent thesaurus" https://smartdefine.org/urgent/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, urgent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/urgent/thesaurus/synonyms>.
MLASmart Define. "urgent thesaurus" 3 August 2015. Web. 27 September 2026. <https://smartdefine.org/urgent/thesaurus/synonyms>