4
obligatory(adjective, important, significant, essential, critical)
4
rigid(adjective, severity)
4
trying(adjective, heavy)
4
vital(adjective, big, heavy, important, significant)
3
austere(adjective, severity)
3
difficult(adjective, hard, tough, severe, heavy)
3
emergency(noun, adjective)
3
fastidious
3
galling
3
mandatory(adjective, significant, essential, basic, vital)
3
menacing(adjective, urgent, pressing)
3
necessitous(essential, required, needed)
3
peremptory(adjective, severity)
3
rush
3
superincumbent(adjective, difficult, heavy, cruel, demanding)
3
threatening(adjective, urgent, pressing)
3
unsparing
2
absorbing
2
arduous(adjective, difficult, heavy, taxing)
2
climacteric
11 years ago|6k views|share |citing 
APASmart Define. (2015). exigent thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/exigent/thesaurus/synonyms
ChicagoSmart Define. 2015. "exigent thesaurus" https://smartdefine.org/exigent/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, exigent thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/exigent/thesaurus/synonyms>.
MLASmart Define. "exigent thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/exigent/thesaurus/synonyms>