5
pressing(adjective, important, significant, essential, critical)
5
unavoidable(adjective, certain, significant, essential, basic)
5
urgent(adjective, important, significant, essential, critical)
4
enforced(adjective, affected, essential, strained, unnatural)
4
exigent(adjective, important, significant, essential, critical)
4
imperious(adjective, essential, commanding, required, authoritative)
4
inexorable(adjective, obvious, expected, predictable, compulsion)
4
needful(adjective, significant, essential, basic, vital)
4
vital(adjective, important, significant, essential, critical)
3
coercive(adjective, affected, essential, compulsion, strained)
3
compelling(adjective, significant, essential, basic, vital)
3
crucial(adjective, important, significant, essential, critical)
3
imposed
3
inescapable(adjective, important, essential, vital, obvious)
3
needed(adjective, significant, essential, basic, vital)
3
stringent(adjective, affected, duty, compulsion, strained)
2
compulsatory(adjective, essential, compulsion, commanding, required)
2
compulsive
2
conclusive(necessary, required)
2
decisive(adjective, significant, essential, basic, vital)
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APASmart Define. (2015). obligatory thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/obligatory/thesaurus/synonyms
ChicagoSmart Define. 2015. "obligatory thesaurus" https://smartdefine.org/obligatory/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, obligatory thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/obligatory/thesaurus/synonyms>.
MLASmart Define. "obligatory thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/obligatory/thesaurus/synonyms>